42881949 has 12 divisors (see below), whose sum is σ = 67571712. Its totient is φ = 25989000.

The previous prime is 42881921. The next prime is 42881987. The reversal of 42881949 is 94918824.

It is not a de Polignac number, because 42881949 - 2¹⁵ = 42849181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42881989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216477 + ... + 216674.

It is an arithmetic number, because the mean of its divisors is an integer number (5630976).

Almost surely, 2^42881949 is an apocalyptic number.

It is an amenable number.

42881949 is a deficient number, since it is larger than the sum of its proper divisors (24689763).

42881949 is a wasteful number, since it uses less digits than its factorization.

42881949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433168 (or 433165 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 42881949 is about 6548.4310334614. The cubic root of 42881949 is about 350.0189078221.

The spelling of 42881949 in words is "forty-two million, eight hundred eighty-one thousand, nine hundred forty-nine".