1252475757 has 16 divisors (see below), whose sum is σ = 1998252480. Its totient is φ = 770754096.

The previous prime is 1252475723. The next prime is 1252475761. The reversal of 1252475757 is 7575742521.

1252475757 is a `hidden beast` number, since 1 + 2 + 524 + 75 + 7 + 57 = 666.

It is not a de Polignac number, because 1252475757 - 2⁸ = 1252475501 is a prime.

It is a super-3 number, since 3×1252475757³ (a number of 28 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252473757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1783803 + ... + 1784504.

It is an arithmetic number, because the mean of its divisors is an integer number (124890780).

Almost surely, 2^1252475757 is an apocalyptic number.

It is an amenable number.

1252475757 is a deficient number, since it is larger than the sum of its proper divisors (745776723).

1252475757 is a wasteful number, since it uses less digits than its factorization.

1252475757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568329 (or 3568323 counting only the distinct ones).

The product of its digits is 686000, while the sum is 45.

The square root of 1252475757 is about 35390.3342312559. The cubic root of 1252475757 is about 1077.9280569109.

The spelling of 1252475757 in words is "one billion, two hundred fifty-two million, four hundred seventy-five thousand, seven hundred fifty-seven".