156861243 has 48 divisors (see below), whose sum is σ = 283675392. Its totient is φ = 81144000.

The previous prime is 156861217. The next prime is 156861253. The reversal of 156861243 is 342168651.

It is a happy number.

156861243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 156861243 - 2⁶ = 156861179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156861198 and 156861207.

It is not an unprimeable number, because it can be changed into a prime (156861253) 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, 319228 + ... + 319718.

It is an arithmetic number, because the mean of its divisors is an integer number (5909904).

Almost surely, 2^156861243 is an apocalyptic number.

156861243 is a deficient number, since it is larger than the sum of its proper divisors (126814149).

156861243 is a wasteful number, since it uses less digits than its factorization.

156861243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 973 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 156861243 is about 12524.4258551041. The cubic root of 156861243 is about 539.3100963211.

The spelling of 156861243 in words is "one hundred fifty-six million, eight hundred sixty-one thousand, two hundred forty-three".