123151242 has 16 divisors (see below), whose sum is σ = 248483520. Its totient is φ = 40686912.

The previous prime is 123151211. The next prime is 123151243. The reversal of 123151242 is 242151321.

It is a super-2 number, since 2×123151242² = 30332456812285128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123151243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90142 + ... + 91497.

It is an arithmetic number, because the mean of its divisors is an integer number (15530220).

Almost surely, 2^123151242 is an apocalyptic number.

123151242 is an abundant number, since it is smaller than the sum of its proper divisors (125332278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123151242 is a wasteful number, since it uses less digits than its factorization.

123151242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181757.

The product of its digits is 480, while the sum is 21.

The square root of 123151242 is about 11097.3529276130. The cubic root of 123151242 is about 497.5227359289.

The spelling of 123151242 in words is "one hundred twenty-three million, one hundred fifty-one thousand, two hundred forty-two".