123260921 has 6 divisors (see below), whose sum is σ = 143385210. Its totient is φ = 105652176.

The previous prime is 123260903. The next prime is 123260939. The reversal of 123260921 is 129062321.

It is an interprime number because it is at equal distance from previous prime (123260903) and next prime (123260939).

It can be written as a sum of positive squares in only one way, i.e., 61795321 + 61465600 = 7861^2 + 7840^2 .

It is a de Polignac number, because none of the positive numbers 2^k-123260921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123260941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1257716 + ... + 1257813.

It is an arithmetic number, because the mean of its divisors is an integer number (23897535).

Almost surely, 2^123260921 is an apocalyptic number.

It is an amenable number.

123260921 is a deficient number, since it is larger than the sum of its proper divisors (20124289).

123260921 is an equidigital number, since it uses as much as digits as its factorization.

123260921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515543 (or 2515536 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 123260921 is about 11102.2935017950. The cubic root of 123260921 is about 497.6703906983.

The spelling of 123260921 in words is "one hundred twenty-three million, two hundred sixty thousand, nine hundred twenty-one".