121625791 has 12 divisors (see below), whose sum is σ = 141665520. Its totient is φ = 104116320.

The previous prime is 121625789. The next prime is 121625807. The reversal of 121625791 is 197526121.

It is not a de Polignac number, because 121625791 - 2¹ = 121625789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121625731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63790 + ... + 65668.

It is an arithmetic number, because the mean of its divisors is an integer number (11805460).

Almost surely, 2^121625791 is an apocalyptic number.

121625791 is a deficient number, since it is larger than the sum of its proper divisors (20039729).

121625791 is a wasteful number, since it uses less digits than its factorization.

121625791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214 (or 3207 counting only the distinct ones).

The product of its digits is 7560, while the sum is 34.

The square root of 121625791 is about 11028.4083620439. The cubic root of 121625791 is about 495.4599554298.

The spelling of 121625791 in words is "one hundred twenty-one million, six hundred twenty-five thousand, seven hundred ninety-one".