121628507 has 16 divisors (see below), whose sum is σ = 163306752. Its totient is φ = 87484320.

The previous prime is 121628501. The next prime is 121628539. The reversal of 121628507 is 705826121.

It is not a de Polignac number, because 121628507 - 2¹⁰ = 121627483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121628501) 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, 59753 + ... + 61754.

It is an arithmetic number, because the mean of its divisors is an integer number (10206672).

Almost surely, 2^121628507 is an apocalyptic number.

121628507 is a deficient number, since it is larger than the sum of its proper divisors (41678245).

121628507 is a wasteful number, since it uses less digits than its factorization.

121628507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121538.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 121628507 is about 11028.5314978922. The cubic root of 121628507 is about 495.4636434065.

The spelling of 121628507 in words is "one hundred twenty-one million, six hundred twenty-eight thousand, five hundred seven".