123451320 has 32 divisors (see below), whose sum is σ = 370354320. Its totient is φ = 32920320.

The previous prime is 123451313. The next prime is 123451337. The reversal of 123451320 is 23154321.

It is a congruent number.

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, 514261 + ... + 514500.

Almost surely, 2^123451320 is an apocalyptic number.

123451320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123451320 is an abundant number, since it is smaller than the sum of its proper divisors (246903000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123451320 is a wasteful number, since it uses less digits than its factorization.

123451320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028775 (or 1028771 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 123451320 is about 11110.8649528288. The cubic root of 123451320 is about 497.9265064688.

The spelling of 123451320 in words is "one hundred twenty-three million, four hundred fifty-one thousand, three hundred twenty".