42956149 has 4 divisors (see below), whose sum is σ = 44117164. Its totient is φ = 41795136.

The previous prime is 42956141. The next prime is 42956153. The reversal of 42956149 is 94165924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29866225 + 13089924 = 5465^2 + 3618^2 .

It is a cyclic number.

It is not a de Polignac number, because 42956149 - 2³ = 42956141 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 (42956141) 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, 580452 + ... + 580525.

It is an arithmetic number, because the mean of its divisors is an integer number (11029291).

Almost surely, 2^42956149 is an apocalyptic number.

It is an amenable number.

42956149 is a deficient number, since it is larger than the sum of its proper divisors (1161015).

42956149 is a wasteful number, since it uses less digits than its factorization.

42956149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161014.

The product of its digits is 77760, while the sum is 40.

The square root of 42956149 is about 6554.0940640183. The cubic root of 42956149 is about 350.2206744413.

The spelling of 42956149 in words is "forty-two million, nine hundred fifty-six thousand, one hundred forty-nine".