421082537 has 6 divisors (see below), whose sum is σ = 447309438. Its totient is φ = 396312704.

The previous prime is 421082521. The next prime is 421082549. The reversal of 421082537 is 735280124.

It can be written as a sum of positive squares in 3 ways, for example, as 202663696 + 218418841 = 14236^2 + 14779^2 .

It is not a de Polignac number, because 421082537 - 2⁴ = 421082521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421082507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 728228 + ... + 728805.

It is an arithmetic number, because the mean of its divisors is an integer number (74551573).

Almost surely, 2^421082537 is an apocalyptic number.

It is an amenable number.

421082537 is a deficient number, since it is larger than the sum of its proper divisors (26226901).

421082537 is a wasteful number, since it uses less digits than its factorization.

421082537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457067 (or 1457050 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 421082537 is about 20520.2957337364. The cubic root of 421082537 is about 749.5300979472.

The spelling of 421082537 in words is "four hundred twenty-one million, eighty-two thousand, five hundred thirty-seven".