421252527 has 4 divisors (see below), whose sum is σ = 561670040. Its totient is φ = 280835016.

The previous prime is 421252499. The next prime is 421252529. The reversal of 421252527 is 725252124.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-421252527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421252494 and 421252503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421252529) 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, 70208752 + ... + 70208757.

It is an arithmetic number, because the mean of its divisors is an integer number (140417510).

Almost surely, 2^421252527 is an apocalyptic number.

421252527 is a deficient number, since it is larger than the sum of its proper divisors (140417513).

421252527 is a wasteful number, since it uses less digits than its factorization.

421252527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140417512.

The product of its digits is 11200, while the sum is 30.

The square root of 421252527 is about 20524.4373126281. The cubic root of 421252527 is about 749.6309455393.

The spelling of 421252527 in words is "four hundred twenty-one million, two hundred fifty-two thousand, five hundred twenty-seven".