407252130021 has 64 divisors (see below), whose sum is σ = 679092019200. Its totient is φ = 239066121600.

The previous prime is 407252129993. The next prime is 407252130037. The reversal of 407252130021 is 120031252704.

407252130021 is a `hidden beast` number, since 40 + 72 + 521 + 30 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 407252130021 - 2¹⁵ = 407252097253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407252130121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1572300 + ... + 1812906.

It is an arithmetic number, because the mean of its divisors is an integer number (10610812800).

Almost surely, 2^407252130021 is an apocalyptic number.

407252130021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

407252130021 is a deficient number, since it is larger than the sum of its proper divisors (271839889179).

407252130021 is a wasteful number, since it uses less digits than its factorization.

407252130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240807 (or 240801 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

Adding to 407252130021 its reverse (120031252704), we get a palindrome (527283382725).

The spelling of 407252130021 in words is "four hundred seven billion, two hundred fifty-two million, one hundred thirty thousand, twenty-one".