1257520452 has 12 divisors (see below), whose sum is σ = 2934214416. Its totient is φ = 419173480.

The previous prime is 1257520441. The next prime is 1257520463. The reversal of 1257520452 is 2540257521.

It is an interprime number because it is at equal distance from previous prime (1257520441) and next prime (1257520463).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-4 number, since 4×1257520452⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52396674 + ... + 52396697.

It is an arithmetic number, because the mean of its divisors is an integer number (244517868).

Almost surely, 2^1257520452 is an apocalyptic number.

1257520452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1257520452 is an abundant number, since it is smaller than the sum of its proper divisors (1676693964).

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

1257520452 is a wasteful number, since it uses less digits than its factorization.

1257520452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104793378 (or 104793376 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 33.

The square root of 1257520452 is about 35461.5348229599. The cubic root of 1257520452 is about 1079.3733367272.

Adding to 1257520452 its reverse (2540257521), we get a palindrome (3797777973).

The spelling of 1257520452 in words is "one billion, two hundred fifty-seven million, five hundred twenty thousand, four hundred fifty-two".