156001061 has 4 divisors (see below), whose sum is σ = 165177612. Its totient is φ = 146824512.

The previous prime is 156001051. The next prime is 156001081. The reversal of 156001061 is 160100651.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160100651 = 53 ⋅3020767.

It can be written as a sum of positive squares in 2 ways, for example, as 121132036 + 34869025 = 11006^2 + 5905^2 .

It is not a de Polignac number, because 156001061 - 2⁶ = 156000997 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 (156001031) 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, 4588250 + ... + 4588283.

It is an arithmetic number, because the mean of its divisors is an integer number (41294403).

Almost surely, 2^156001061 is an apocalyptic number.

It is an amenable number.

156001061 is a deficient number, since it is larger than the sum of its proper divisors (9176551).

156001061 is an equidigital number, since it uses as much as digits as its factorization.

156001061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176550.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 156001061 is about 12490.0384707174. The cubic root of 156001061 is about 538.3224816309.

It can be divided in two parts, 15600 and 1061, that added together give a palindrome (16661).

The spelling of 156001061 in words is "one hundred fifty-six million, one thousand, sixty-one".