139616121 has 16 divisors (see below), whose sum is σ = 203904000. Its totient is φ = 84580608.

The previous prime is 139616119. The next prime is 139616143. The reversal of 139616121 is 121616931.

It is not a de Polignac number, because 139616121 - 2¹ = 139616119 is a prime.

It is a super-2 number, since 2×139616121² = 38985322486173282, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139616221) 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, 45721 + ... + 48678.

It is an arithmetic number, because the mean of its divisors is an integer number (12744000).

Almost surely, 2^139616121 is an apocalyptic number.

It is an amenable number.

139616121 is a deficient number, since it is larger than the sum of its proper divisors (64287879).

139616121 is a wasteful number, since it uses less digits than its factorization.

139616121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94448.

The product of its digits is 1944, while the sum is 30.

The square root of 139616121 is about 11815.9265823718. The cubic root of 139616121 is about 518.7743830219.

The spelling of 139616121 in words is "one hundred thirty-nine million, six hundred sixteen thousand, one hundred twenty-one".