156342261 has 4 divisors (see below), whose sum is σ = 208456352. Its totient is φ = 104228172.

The previous prime is 156342259. The next prime is 156342287. The reversal of 156342261 is 162243651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 156342261 - 2¹ = 156342259 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156342211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26057041 + ... + 26057046.

It is an arithmetic number, because the mean of its divisors is an integer number (52114088).

Almost surely, 2^156342261 is an apocalyptic number.

It is an amenable number.

156342261 is a deficient number, since it is larger than the sum of its proper divisors (52114091).

156342261 is an equidigital number, since it uses as much as digits as its factorization.

156342261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52114090.

The product of its digits is 8640, while the sum is 30.

The square root of 156342261 is about 12503.6898953869. The cubic root of 156342261 is about 538.7146624755.

The spelling of 156342261 in words is "one hundred fifty-six million, three hundred forty-two thousand, two hundred sixty-one".