123036381 has 48 divisors (see below), whose sum is σ = 207385920. Its totient is φ = 71655840.

The previous prime is 123036377. The next prime is 123036391. The reversal of 123036381 is 183630321.

It is a happy number.

123036381 is a `hidden beast` number, since 1 + 23 + 0 + 3 + 638 + 1 = 666.

It is not a de Polignac number, because 123036381 - 2² = 123036377 is a prime.

It is a super-2 number, since 2×123036381² = 30275902099154322, which contains 22 as substring.

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

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123036311) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126226 + ... + 127196.

It is an arithmetic number, because the mean of its divisors is an integer number (4320540).

Almost surely, 2^123036381 is an apocalyptic number.

It is an amenable number.

123036381 is a deficient number, since it is larger than the sum of its proper divisors (84349539).

123036381 is a wasteful number, since it uses less digits than its factorization.

123036381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 123036381 is about 11092.1765672928. The cubic root of 123036381 is about 497.3680109105.

The spelling of 123036381 in words is "one hundred twenty-three million, thirty-six thousand, three hundred eighty-one".