156342149 has 4 divisors (see below), whose sum is σ = 165538764. Its totient is φ = 147145536.

The previous prime is 156342133. The next prime is 156342169. The reversal of 156342149 is 941243651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 941243651 = 23 ⋅40923637.

It can be written as a sum of positive squares in 2 ways, for example, as 89397025 + 66945124 = 9455^2 + 8182^2 .

It is a cyclic number.

It is not a de Polignac number, because 156342149 - 2⁴ = 156342133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156342169) 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 3 ways as a sum of consecutive naturals, for example, 4598282 + ... + 4598315.

It is an arithmetic number, because the mean of its divisors is an integer number (41384691).

Almost surely, 2^156342149 is an apocalyptic number.

It is an amenable number.

156342149 is a deficient number, since it is larger than the sum of its proper divisors (9196615).

156342149 is an equidigital number, since it uses as much as digits as its factorization.

156342149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9196614.

The product of its digits is 25920, while the sum is 35.

The square root of 156342149 is about 12503.6854167081. The cubic root of 156342149 is about 538.7145338345.

The spelling of 156342149 in words is "one hundred fifty-six million, three hundred forty-two thousand, one hundred forty-nine".