1242957312 has 400 divisors, whose sum is σ = 4117517712. Its totient is φ = 371589120.

The previous prime is 1242957293. The next prime is 1242957337. The reversal of 1242957312 is 2137592421.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 28905963 + ... + 28906005.

Almost surely, 2^1242957312 is an apocalyptic number.

1242957312 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 1242957312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058758856).

1242957312 is an abundant number, since it is smaller than the sum of its proper divisors (2874560400).

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

1242957312 is an equidigital number, since it uses as much as digits as its factorization.

1242957312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 106 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 1242957312 is about 35255.5997254337. The cubic root of 1242957312 is about 1075.1904654767.

The spelling of 1242957312 in words is "one billion, two hundred forty-two million, nine hundred fifty-seven thousand, three hundred twelve".