867650121 has 24 divisors (see below), whose sum is σ = 1375153416. Its totient is φ = 523860480.

The previous prime is 867650099. The next prime is 867650129. The reversal of 867650121 is 121056768.

867650121 is a `hidden beast` number, since 86 + 76 + 501 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5405625 + 862244496 = 2325^2 + 29364^2 .

It is not a de Polignac number, because 867650121 - 2⁶ = 867650057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (867650129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63760 + ... + 76161.

It is an arithmetic number, because the mean of its divisors is an integer number (57298059).

Almost surely, 2^867650121 is an apocalyptic number.

It is an amenable number.

867650121 is a deficient number, since it is larger than the sum of its proper divisors (507503295).

867650121 is a wasteful number, since it uses less digits than its factorization.

867650121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139993 (or 139990 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 867650121 is about 29455.9012932893. The cubic root of 867650121 is about 953.7799981862.

The spelling of 867650121 in words is "eight hundred sixty-seven million, six hundred fifty thousand, one hundred twenty-one".