123455072 has 24 divisors (see below), whose sum is σ = 261749376. Its totient is φ = 56979072.

The previous prime is 123455069. The next prime is 123455077. The reversal of 123455072 is 270554321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123455077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147968 + ... + 148799.

It is an arithmetic number, because the mean of its divisors is an integer number (10906224).

Almost surely, 2^123455072 is an apocalyptic number.

It is an amenable number.

123455072 is an abundant number, since it is smaller than the sum of its proper divisors (138294304).

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

123455072 is a wasteful number, since it uses less digits than its factorization.

123455072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296790 (or 296782 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 123455072 is about 11111.0337952866. The cubic root of 123455072 is about 497.9315508359.

The spelling of 123455072 in words is "one hundred twenty-three million, four hundred fifty-five thousand, seventy-two".