1242040032 has 144 divisors (see below), whose sum is σ = 3779914320. Its totient is φ = 385793280.

The previous prime is 1242040021. The next prime is 1242040049. The reversal of 1242040032 is 2300402421.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1242040032² = 3085326882181122048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1242039987 and 1242040014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20361282 + ... + 20361342.

It is an arithmetic number, because the mean of its divisors is an integer number (26249405).

Almost surely, 2^1242040032 is an apocalyptic number.

1242040032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242040032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889957160).

1242040032 is an abundant number, since it is smaller than the sum of its proper divisors (2537874288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242040032 is an frugal number, since it uses more digits than its factorization.

1242040032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1242040032 is about 35242.5883271930. The cubic root of 1242040032 is about 1074.9259100191.

Adding to 1242040032 its reverse (2300402421), we get a palindrome (3542442453).

The spelling of 1242040032 in words is "one billion, two hundred forty-two million, forty thousand, thirty-two".