156894145 has 4 divisors (see below), whose sum is σ = 188272980. Its totient is φ = 125515312.

The previous prime is 156894137. The next prime is 156894163. The reversal of 156894145 is 541498651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541498651 = 19 ⋅28499929.

It can be written as a sum of positive squares in 2 ways, for example, as 33039504 + 123854641 = 5748^2 + 11129^2 .

It is a cyclic number.

It is not a de Polignac number, because 156894145 - 2³ = 156894137 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15689410 + ... + 15689419.

It is an arithmetic number, because the mean of its divisors is an integer number (47068245).

Almost surely, 2^156894145 is an apocalyptic number.

It is an amenable number.

156894145 is a deficient number, since it is larger than the sum of its proper divisors (31378835).

156894145 is an equidigital number, since it uses as much as digits as its factorization.

156894145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31378834.

The product of its digits is 172800, while the sum is 43.

The square root of 156894145 is about 12525.7392995384. The cubic root of 156894145 is about 539.3478008553.

The spelling of 156894145 in words is "one hundred fifty-six million, eight hundred ninety-four thousand, one hundred forty-five".