123801656 has 16 divisors (see below), whose sum is σ = 253230840. Its totient is φ = 56273440.

The previous prime is 123801641. The next prime is 123801679. The reversal of 123801656 is 656108321.

It is a happy number.

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, 703331 + ... + 703506.

Almost surely, 2^123801656 is an apocalyptic number.

It is an amenable number.

123801656 is an abundant number, since it is smaller than the sum of its proper divisors (129429184).

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

123801656 is a wasteful number, since it uses less digits than its factorization.

123801656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406854 (or 1406850 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 123801656 is about 11126.6192529447. The cubic root of 123801656 is about 498.3970747526.

Adding to 123801656 its reverse (656108321), we get a palindrome (779909977).

The spelling of 123801656 in words is "one hundred twenty-three million, eight hundred one thousand, six hundred fifty-six".