1242573420 has 96 divisors (see below), whose sum is σ = 3815755776. Its totient is φ = 299622400.

The previous prime is 1242573377. The next prime is 1242573427. The reversal of 1242573420 is 243752421.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1242573427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121132 + ... + 130988.

It is an arithmetic number, because the mean of its divisors is an integer number (39747456).

Almost surely, 2^1242573420 is an apocalyptic number.

1242573420 is a gapful number since it is divisible by the number (10) 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 1242573420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1907877888).

1242573420 is an abundant number, since it is smaller than the sum of its proper divisors (2573182356).

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

1242573420 is a wasteful number, since it uses less digits than its factorization.

1242573420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10071 (or 10069 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 1242573420 is about 35250.1548932767. The cubic root of 1242573420 is about 1075.0797618842.

The spelling of 1242573420 in words is "one billion, two hundred forty-two million, five hundred seventy-three thousand, four hundred twenty".