123451560 has 128 divisors (see below), whose sum is σ = 414777600. Its totient is φ = 32659200.

The previous prime is 123451553. The next prime is 123451583. The reversal of 123451560 is 65154321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162702 + ... + 163458.

It is an arithmetic number, because the mean of its divisors is an integer number (3240450).

Almost surely, 2^123451560 is an apocalyptic number.

123451560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123451560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207388800).

123451560 is an abundant number, since it is smaller than the sum of its proper divisors (291326040).

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

123451560 is a wasteful number, since it uses less digits than its factorization.

123451560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 123451560 is about 11110.8757530629. The cubic root of 123451560 is about 497.9268291393.

The spelling of 123451560 in words is "one hundred twenty-three million, four hundred fifty-one thousand, five hundred sixty".