123021264 has 20 divisors (see below), whose sum is σ = 317805056. Its totient is φ = 41007072.

The previous prime is 123021253. The next prime is 123021271. The reversal of 123021264 is 462120321.

It is a self number, because there is not a number n which added to its sum of digits gives 123021264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281424 + ... + 1281519.

Almost surely, 2^123021264 is an apocalyptic number.

It is an amenable number.

123021264 is an abundant number, since it is smaller than the sum of its proper divisors (194783792).

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

123021264 is a wasteful number, since it uses less digits than its factorization.

123021264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562954 (or 2562948 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 123021264 is about 11091.4951201360. The cubic root of 123021264 is about 497.3476401874.

Adding to 123021264 its reverse (462120321), we get a palindrome (585141585).

The spelling of 123021264 in words is "one hundred twenty-three million, twenty-one thousand, two hundred sixty-four".