156940601 has 4 divisors (see below), whose sum is σ = 159151104. Its totient is φ = 154730100.

The previous prime is 156940571. The next prime is 156940613. The reversal of 156940601 is 106049651.

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, and also an emirpimes, since its reverse is a distinct semiprime: 106049651 = 569 ⋅186379.

It is a cyclic number.

It is not a de Polignac number, because 156940601 - 2¹⁴ = 156924217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (156940681) 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, 1105145 + ... + 1105286.

It is an arithmetic number, because the mean of its divisors is an integer number (39787776).

Almost surely, 2^156940601 is an apocalyptic number.

It is an amenable number.

156940601 is a deficient number, since it is larger than the sum of its proper divisors (2210503).

156940601 is an equidigital number, since it uses as much as digits as its factorization.

156940601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210502.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 156940601 is about 12527.5935837654. The cubic root of 156940601 is about 539.4010288217.

The spelling of 156940601 in words is "one hundred fifty-six million, nine hundred forty thousand, six hundred one".