1242997392 has 160 divisors (see below), whose sum is σ = 3967746048. Its totient is φ = 326527488.

The previous prime is 1242997363. The next prime is 1242997397. The reversal of 1242997392 is 2937992421.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1242997397) 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, 1672573 + ... + 1673315.

Almost surely, 2^1242997392 is an apocalyptic number.

1242997392 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 1242997392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1983873024).

1242997392 is an abundant number, since it is smaller than the sum of its proper divisors (2724748656).

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

1242997392 is a wasteful number, since it uses less digits than its factorization.

1242997392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1151 counting only the distinct ones).

The product of its digits is 489888, while the sum is 48.

The square root of 1242997392 is about 35256.1681411920. The cubic root of 1242997392 is about 1075.2020221006.

The spelling of 1242997392 in words is "one billion, two hundred forty-two million, nine hundred ninety-seven thousand, three hundred ninety-two".