123401290 has 16 divisors (see below), whose sum is σ = 228126312. Its totient is φ = 48026304.

The previous prime is 123401261. The next prime is 123401309. The reversal of 123401290 is 92104321.

It can be written as a sum of positive squares in 4 ways, for example, as 88153321 + 35247969 = 9389^2 + 5937^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166389 + ... + 167128.

Almost surely, 2^123401290 is an apocalyptic number.

123401290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123401290 is a deficient number, since it is larger than the sum of its proper divisors (104725022).

123401290 is a wasteful number, since it uses less digits than its factorization.

123401290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333561.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 123401290 is about 11108.6133248034. The cubic root of 123401290 is about 497.8592339896.

The spelling of 123401290 in words is "one hundred twenty-three million, four hundred one thousand, two hundred ninety".