421579137 has 16 divisors (see below), whose sum is σ = 663130112. Its totient is φ = 233130960.

The previous prime is 421579129. The next prime is 421579183. The reversal of 421579137 is 731975124.

It is not a de Polignac number, because 421579137 - 2³ = 421579129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421579095 and 421579104.

It is not an unprimeable number, because it can be changed into a prime (421579117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323143 + ... + 324444.

It is an arithmetic number, because the mean of its divisors is an integer number (41445632).

Almost surely, 2^421579137 is an apocalyptic number.

It is an amenable number.

421579137 is a deficient number, since it is larger than the sum of its proper divisors (241550975).

421579137 is a wasteful number, since it uses less digits than its factorization.

421579137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647628.

The product of its digits is 52920, while the sum is 39.

The square root of 421579137 is about 20532.3923837433. The cubic root of 421579137 is about 749.8246327761.

The spelling of 421579137 in words is "four hundred twenty-one million, five hundred seventy-nine thousand, one hundred thirty-seven".