156123140 has 12 divisors (see below), whose sum is σ = 327858636. Its totient is φ = 62449248.

The previous prime is 156123127. The next prime is 156123151. The reversal of 156123140 is 41321651.

It can be written as a sum of positive squares in 2 ways, for example, as 58033924 + 98089216 = 7618^2 + 9904^2 .

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, 3903059 + ... + 3903098.

It is an arithmetic number, because the mean of its divisors is an integer number (27321553).

Almost surely, 2^156123140 is an apocalyptic number.

156123140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156123140 is an abundant number, since it is smaller than the sum of its proper divisors (171735496).

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

156123140 is a wasteful number, since it uses less digits than its factorization.

156123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7806166 (or 7806164 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 156123140 is about 12494.9245696003. The cubic root of 156123140 is about 538.4628668622.

Adding to 156123140 its reverse (41321651), we get a palindrome (197444791).

The spelling of 156123140 in words is "one hundred fifty-six million, one hundred twenty-three thousand, one hundred forty".