1252452500421 has 4 divisors (see below), whose sum is σ = 1669936667232. Its totient is φ = 834968333612.

The previous prime is 1252452500399. The next prime is 1252452500441. The reversal of 1252452500421 is 1240052542521.

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.

It is a cyclic number.

It is not a de Polignac number, because 1252452500421 - 2¹⁷ = 1252452369349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252452500441) 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, 208742083401 + ... + 208742083406.

It is an arithmetic number, because the mean of its divisors is an integer number (417484166808).

Almost surely, 2^{1252452500421} is an apocalyptic number.

It is an amenable number.

1252452500421 is a deficient number, since it is larger than the sum of its proper divisors (417484166811).

1252452500421 is an equidigital number, since it uses as much as digits as its factorization.

1252452500421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417484166810.

The product of its (nonzero) digits is 32000, while the sum is 33.

The spelling of 1252452500421 in words is "one trillion, two hundred fifty-two billion, four hundred fifty-two million, five hundred thousand, four hundred twenty-one".