156105049 has 4 divisors (see below), whose sum is σ = 157620736. Its totient is φ = 154589364.

The previous prime is 156105041. The next prime is 156105097. The reversal of 156105049 is 940501651.

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: 940501651 = 479 ⋅1963469.

It is a cyclic number.

It is not a de Polignac number, because 156105049 - 2³ = 156105041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 156105049.

It is not an unprimeable number, because it can be changed into a prime (156105041) 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, 757689 + ... + 757894.

It is an arithmetic number, because the mean of its divisors is an integer number (39405184).

Almost surely, 2^156105049 is an apocalyptic number.

It is an amenable number.

156105049 is a deficient number, since it is larger than the sum of its proper divisors (1515687).

156105049 is a wasteful number, since it uses less digits than its factorization.

156105049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515686.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 156105049 is about 12494.2006146852. The cubic root of 156105049 is about 538.4420676649.

The spelling of 156105049 in words is "one hundred fifty-six million, one hundred five thousand, forty-nine".