1252641601 has 4 divisors (see below), whose sum is σ = 1252714432. Its totient is φ = 1252568772.

The previous prime is 1252641547. The next prime is 1252641629. The reversal of 1252641601 is 1061462521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1252641601 - 2⁷ = 1252641473 is a prime.

It is a super-2 number, since 2×1252641601² = 3138221961111686402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1252641601.

It is not an unprimeable number, because it can be changed into a prime (1252641641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5356 + ... + 50338.

It is an arithmetic number, because the mean of its divisors is an integer number (313178608).

Almost surely, 2^1252641601 is an apocalyptic number.

It is an amenable number.

1252641601 is a deficient number, since it is larger than the sum of its proper divisors (72831).

1252641601 is an equidigital number, since it uses as much as digits as its factorization.

1252641601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72830.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1252641601 is about 35392.6772228381. The cubic root of 1252641601 is about 1077.9756320196.

The spelling of 1252641601 in words is "one billion, two hundred fifty-two million, six hundred forty-one thousand, six hundred one".