156261145 has 4 divisors (see below), whose sum is σ = 187513380. Its totient is φ = 125008912.

The previous prime is 156261143. The next prime is 156261151. The reversal of 156261145 is 541162651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541162651 = 73 ⋅7413187.

It can be written as a sum of positive squares in 2 ways, for example, as 39275289 + 116985856 = 6267^2 + 10816^2 .

It is a cyclic number.

It is not a de Polignac number, because 156261145 - 2¹ = 156261143 is a prime.

It is a super-2 number, since 2×156261145² = 48835090873422050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (156261143) 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, 15626110 + ... + 15626119.

It is an arithmetic number, because the mean of its divisors is an integer number (46878345).

Almost surely, 2^156261145 is an apocalyptic number.

It is an amenable number.

156261145 is a deficient number, since it is larger than the sum of its proper divisors (31252235).

156261145 is an equidigital number, since it uses as much as digits as its factorization.

156261145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31252234.

The product of its digits is 7200, while the sum is 31.

The square root of 156261145 is about 12500.4457920508. The cubic root of 156261145 is about 538.6214781633.

The spelling of 156261145 in words is "one hundred fifty-six million, two hundred sixty-one thousand, one hundred forty-five".