123451506 has 16 divisors (see below), whose sum is σ = 274336800. Its totient is φ = 41150484.

The previous prime is 123451487. The next prime is 123451553. The reversal of 123451506 is 605154321.

It is a super-3 number, since 3×123451506³ (a number of 25 digits) contains 333 as substring.

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

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 123451506.

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, 1143016 + ... + 1143123.

It is an arithmetic number, because the mean of its divisors is an integer number (17146050).

Almost surely, 2^123451506 is an apocalyptic number.

123451506 is an abundant number, since it is smaller than the sum of its proper divisors (150885294).

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

123451506 is a wasteful number, since it uses less digits than its factorization.

123451506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286150 (or 2286144 counting only the distinct ones).

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

The square root of 123451506 is about 11110.8733230111. The cubic root of 123451506 is about 497.9267565384.

The spelling of 123451506 in words is "one hundred twenty-three million, four hundred fifty-one thousand, five hundred six".