123157761 has 16 divisors (see below), whose sum is σ = 171663360. Its totient is φ = 78446160.

The previous prime is 123157703. The next prime is 123157763. The reversal of 123157761 is 167751321.

It is not a de Polignac number, because 123157761 - 2¹¹ = 123155713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123157763) 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, 1035 + ... + 15728.

It is an arithmetic number, because the mean of its divisors is an integer number (10728960).

Almost surely, 2^123157761 is an apocalyptic number.

It is an amenable number.

123157761 is a deficient number, since it is larger than the sum of its proper divisors (48505599).

123157761 is a wasteful number, since it uses less digits than its factorization.

123157761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16876.

The product of its digits is 8820, while the sum is 33.

The square root of 123157761 is about 11097.6466424193. The cubic root of 123157761 is about 497.5315145478.

The spelling of 123157761 in words is "one hundred twenty-three million, one hundred fifty-seven thousand, seven hundred sixty-one".