123725890 has 16 divisors (see below), whose sum is σ = 230386680. Its totient is φ = 47783680.

The previous prime is 123725879. The next prime is 123725897. The reversal of 123725890 is 98527321.

It can be written as a sum of positive squares in 4 ways, for example, as 64112049 + 59613841 = 8007^2 + 7721^2 .

It is not an unprimeable number, because it can be changed into a prime (123725897) 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, 213031 + ... + 213610.

Almost surely, 2^123725890 is an apocalyptic number.

123725890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123725890 is a deficient number, since it is larger than the sum of its proper divisors (106660790).

123725890 is a wasteful number, since it uses less digits than its factorization.

123725890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426677.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 123725890 is about 11123.2140139440. The cubic root of 123725890 is about 498.2953818246.

The spelling of 123725890 in words is "one hundred twenty-three million, seven hundred twenty-five thousand, eight hundred ninety".