1257134742732 has 24 divisors (see below), whose sum is σ = 3199979345472. Its totient is φ = 380949922000.

The previous prime is 1257134742709. The next prime is 1257134742733. The reversal of 1257134742732 is 2372474317521.

It is a happy number.

It is a super-2 number, since 2×1257134742732² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1257134742733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4761873894 + ... + 4761874157.

It is an arithmetic number, because the mean of its divisors is an integer number (133332472728).

Almost surely, 2^{1257134742732} is an apocalyptic number.

1257134742732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1257134742732 is an abundant number, since it is smaller than the sum of its proper divisors (1942844602740).

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

1257134742732 is a wasteful number, since it uses less digits than its factorization.

1257134742732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523748069 (or 9523748067 counting only the distinct ones).

The product of its digits is 1975680, while the sum is 48.

The spelling of 1257134742732 in words is "one trillion, two hundred fifty-seven billion, one hundred thirty-four million, seven hundred forty-two thousand, seven hundred thirty-two".