421053531 has 4 divisors (see below), whose sum is σ = 561404712. Its totient is φ = 280702352.

The previous prime is 421053517. The next prime is 421053533. The reversal of 421053531 is 135350124.

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

It is a cyclic number.

It is not a de Polignac number, because 421053531 - 2⁵ = 421053499 is a prime.

It is a super-2 number, since 2×421053531² = 354572151935135922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421053533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70175586 + ... + 70175591.

It is an arithmetic number, because the mean of its divisors is an integer number (140351178).

Almost surely, 2^421053531 is an apocalyptic number.

421053531 is a deficient number, since it is larger than the sum of its proper divisors (140351181).

421053531 is a wasteful number, since it uses less digits than its factorization.

421053531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140351180.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 421053531 is about 20519.5889578715. The cubic root of 421053531 is about 749.5128872523.

The spelling of 421053531 in words is "four hundred twenty-one million, fifty-three thousand, five hundred thirty-one".