42861291 has 16 divisors (see below), whose sum is σ = 62479488. Its totient is φ = 25920000.

The previous prime is 42861271. The next prime is 42861319. The reversal of 42861291 is 19216824.

It is not a de Polignac number, because 42861291 - 2¹⁰ = 42860267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (42861271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17916 + ... + 20166.

It is an arithmetic number, because the mean of its divisors is an integer number (3904968).

Almost surely, 2^42861291 is an apocalyptic number.

42861291 is a deficient number, since it is larger than the sum of its proper divisors (19618197).

42861291 is a wasteful number, since it uses less digits than its factorization.

42861291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842.

The product of its digits is 6912, while the sum is 33.

The square root of 42861291 is about 6546.8535190578. The cubic root of 42861291 is about 349.9626926221.

The spelling of 42861291 in words is "forty-two million, eight hundred sixty-one thousand, two hundred ninety-one".