156987245 has 8 divisors (see below), whose sum is σ = 189194616. Its totient is φ = 125049856.

The previous prime is 156987241. The next prime is 156987247. The reversal of 156987245 is 542789651.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 40627876 + 116359369 = 6374^2 + 10787^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 156987245 - 2² = 156987241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156987245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156987241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66212 + ... + 68541.

It is an arithmetic number, because the mean of its divisors is an integer number (23649327).

Almost surely, 2^156987245 is an apocalyptic number.

It is an amenable number.

156987245 is a deficient number, since it is larger than the sum of its proper divisors (32207371).

156987245 is a wasteful number, since it uses less digits than its factorization.

156987245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134991.

The product of its digits is 604800, while the sum is 47.

The square root of 156987245 is about 12529.4550958930. The cubic root of 156987245 is about 539.4544616263.

The spelling of 156987245 in words is "one hundred fifty-six million, nine hundred eighty-seven thousand, two hundred forty-five".