464121581 has 12 divisors (see below), whose sum is σ = 588978720. Its totient is φ = 361652760.

The previous prime is 464121551. The next prime is 464121589. The reversal of 464121581 is 185121464.

It is not a de Polignac number, because 464121581 - 2¹⁰ = 464120557 is a prime.

It is a super-2 number, since 2×464121581² = 430817683899879122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (464121589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430001 + ... + 431078.

It is an arithmetic number, because the mean of its divisors is an integer number (49081560).

Almost surely, 2^464121581 is an apocalyptic number.

It is an amenable number.

464121581 is a deficient number, since it is larger than the sum of its proper divisors (124857139).

464121581 is a wasteful number, since it uses less digits than its factorization.

464121581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861104 (or 861097 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 464121581 is about 21543.4811718069. The cubic root of 464121581 is about 774.2429407625.

The spelling of 464121581 in words is "four hundred sixty-four million, one hundred twenty-one thousand, five hundred eighty-one".