156405145 has 8 divisors (see below), whose sum is σ = 202123656. Its totient is φ = 115499136.

The previous prime is 156405103. The next prime is 156405157. The reversal of 156405145 is 541504651.

It can be written as a sum of positive squares in 4 ways, for example, as 2322576 + 154082569 = 1524^2 + 12413^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 156405145 - 2¹¹ = 156403097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1203052 + ... + 1203181.

It is an arithmetic number, because the mean of its divisors is an integer number (25265457).

Almost surely, 2^156405145 is an apocalyptic number.

It is an amenable number.

156405145 is a deficient number, since it is larger than the sum of its proper divisors (45718511).

156405145 is a wasteful number, since it uses less digits than its factorization.

156405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406251.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 156405145 is about 12506.2042602862. The cubic root of 156405145 is about 538.7868800825.

Adding to 156405145 its reverse (541504651), we get a palindrome (697909796).

The spelling of 156405145 in words is "one hundred fifty-six million, four hundred five thousand, one hundred forty-five".