1251653375 has 16 divisors (see below), whose sum is σ = 1785216576. Its totient is φ = 858276000.

The previous prime is 1251653357. The next prime is 1251653393. The reversal of 1251653375 is 5733561521.

It is an interprime number because it is at equal distance from previous prime (1251653357) and next prime (1251653393).

It is not a de Polignac number, because 1251653375 - 2¹² = 1251649279 is a prime.

It is a super-2 number, since 2×1251653375² = 3133272342297781250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714356 + ... + 716105.

It is an arithmetic number, because the mean of its divisors is an integer number (111576036).

Almost surely, 2^1251653375 is an apocalyptic number.

1251653375 is a deficient number, since it is larger than the sum of its proper divisors (533563201).

1251653375 is an equidigital number, since it uses as much as digits as its factorization.

1251653375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430483 (or 1430473 counting only the distinct ones).

The product of its digits is 94500, while the sum is 38.

The square root of 1251653375 is about 35378.7135859969. The cubic root of 1251653375 is about 1077.6920808938.

The spelling of 1251653375 in words is "one billion, two hundred fifty-one million, six hundred fifty-three thousand, three hundred seventy-five".