121651256 has 16 divisors (see below), whose sum is σ = 228879000. Its totient is φ = 60616864.

The previous prime is 121651253. The next prime is 121651261. The reversal of 121651256 is 652156121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121651253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23606 + ... + 28293.

Almost surely, 2^121651256 is an apocalyptic number.

It is an amenable number.

121651256 is a deficient number, since it is larger than the sum of its proper divisors (107227744).

121651256 is a wasteful number, since it uses less digits than its factorization.

121651256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52198 (or 52194 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 121651256 is about 11029.5628199852. The cubic root of 121651256 is about 495.4945314498.

The spelling of 121651256 in words is "one hundred twenty-one million, six hundred fifty-one thousand, two hundred fifty-six".