123800157 has 40 divisors (see below), whose sum is σ = 201552120. Its totient is φ = 75271680.

The previous prime is 123800153. The next prime is 123800161. The reversal of 123800157 is 751008321.

It is an interprime number because it is at equal distance from previous prime (123800153) and next prime (123800161).

It can be written as a sum of positive squares in 4 ways, for example, as 9865881 + 113934276 = 3141^2 + 10674^2 .

It is not a de Polignac number, because 123800157 - 2² = 123800153 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 123800157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123800153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 93057 + ... + 94377.

It is an arithmetic number, because the mean of its divisors is an integer number (5038803).

Almost surely, 2^123800157 is an apocalyptic number.

It is an amenable number.

123800157 is a deficient number, since it is larger than the sum of its proper divisors (77751963).

123800157 is a wasteful number, since it uses less digits than its factorization.

123800157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1426 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 123800157 is about 11126.5518917587. The cubic root of 123800157 is about 498.3950632011.

Adding to 123800157 its reverse (751008321), we get a palindrome (874808478).

The spelling of 123800157 in words is "one hundred twenty-three million, eight hundred thousand, one hundred fifty-seven".