123154490 has 8 divisors (see below), whose sum is σ = 221678100. Its totient is φ = 49261792.

The previous prime is 123154481. The next prime is 123154517. The reversal of 123154490 is 94451321.

It can be written as a sum of positive squares in 2 ways, for example, as 103164649 + 19989841 = 10157^2 + 4471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6157715 + ... + 6157734.

Almost surely, 2^123154490 is an apocalyptic number.

123154490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123154490 is a deficient number, since it is larger than the sum of its proper divisors (98523610).

123154490 is a wasteful number, since it uses less digits than its factorization.

123154490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12315456.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 123154490 is about 11097.4992678531. The cubic root of 123154490 is about 497.5271097909.

The spelling of 123154490 in words is "one hundred twenty-three million, one hundred fifty-four thousand, four hundred ninety".