123351261 has 16 divisors (see below), whose sum is σ = 179945280. Its totient is φ = 74539520.

The previous prime is 123351253. The next prime is 123351281. The reversal of 123351261 is 162153321.

It is not a de Polignac number, because 123351261 - 2³ = 123351253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123351281) 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, 6355 + ... + 16943.

It is an arithmetic number, because the mean of its divisors is an integer number (11246580).

Almost surely, 2^123351261 is an apocalyptic number.

123351261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123351261 is a deficient number, since it is larger than the sum of its proper divisors (56594019).

123351261 is a wasteful number, since it uses less digits than its factorization.

123351261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10956.

The product of its digits is 1080, while the sum is 24.

The square root of 123351261 is about 11106.3612853175. The cubic root of 123351261 is about 497.7919446705.

The spelling of 123351261 in words is "one hundred twenty-three million, three hundred fifty-one thousand, two hundred sixty-one".