123490259 has 4 divisors (see below), whose sum is σ = 124877880. Its totient is φ = 122102640.

The previous prime is 123490249. The next prime is 123490271. The reversal of 123490259 is 952094321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123490259 - 2¹² = 123486163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123490219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693677 + ... + 693854.

It is an arithmetic number, because the mean of its divisors is an integer number (31219470).

Almost surely, 2^123490259 is an apocalyptic number.

123490259 is a deficient number, since it is larger than the sum of its proper divisors (1387621).

123490259 is an equidigital number, since it uses as much as digits as its factorization.

123490259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387620.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 123490259 is about 11112.6171084943. The cubic root of 123490259 is about 497.9788529377.

The spelling of 123490259 in words is "one hundred twenty-three million, four hundred ninety thousand, two hundred fifty-nine".