123521492 has 6 divisors (see below), whose sum is σ = 216162618. Its totient is φ = 61760744.

The previous prime is 123521491. The next prime is 123521501. The reversal of 123521492 is 294125321.

It can be written as a sum of positive squares in only one way, i.e., 121572676 + 1948816 = 11026^2 + 1396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123521491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15440183 + ... + 15440190.

It is an arithmetic number, because the mean of its divisors is an integer number (36027103).

Almost surely, 2^123521492 is an apocalyptic number.

It is an amenable number.

123521492 is a deficient number, since it is larger than the sum of its proper divisors (92641126).

123521492 is a wasteful number, since it uses less digits than its factorization.

123521492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30880377 (or 30880375 counting only the distinct ones).

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

The square root of 123521492 is about 11114.0223141759. The cubic root of 123521492 is about 498.0208321259.

The spelling of 123521492 in words is "one hundred twenty-three million, five hundred twenty-one thousand, four hundred ninety-two".