42949251 has 8 divisors (see below), whose sum is σ = 63628560. Its totient is φ = 28632816.

The previous prime is 42949223. The next prime is 42949271. The reversal of 42949251 is 15294924.

42949251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42949251 - 2¹⁴ = 42932867 is a prime.

It is a super-2 number, since 2×42949251² = 3689276322922002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42949271) by changing a digit.

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, 795330 + ... + 795383.

It is an arithmetic number, because the mean of its divisors is an integer number (7953570).

Almost surely, 2^42949251 is an apocalyptic number.

42949251 is a deficient number, since it is larger than the sum of its proper divisors (20679309).

42949251 is a wasteful number, since it uses less digits than its factorization.

42949251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590722 (or 1590716 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 42949251 is about 6553.5678069278. The cubic root of 42949251 is about 350.2019270164.

The spelling of 42949251 in words is "forty-two million, nine hundred forty-nine thousand, two hundred fifty-one".