42974549 has 4 divisors (see below), whose sum is σ = 44456460. Its totient is φ = 41492640.

The previous prime is 42974543. The next prime is 42974593. The reversal of 42974549 is 94547924.

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 19140625 + 23833924 = 4375^2 + 4882^2 .

It is a cyclic number.

It is not a de Polignac number, because 42974549 - 2⁸ = 42974293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42974543) 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, 740912 + ... + 740969.

It is an arithmetic number, because the mean of its divisors is an integer number (11114115).

Almost surely, 2^42974549 is an apocalyptic number.

It is an amenable number.

42974549 is a deficient number, since it is larger than the sum of its proper divisors (1481911).

42974549 is a wasteful number, since it uses less digits than its factorization.

42974549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481910.

The product of its digits is 362880, while the sum is 44.

The square root of 42974549 is about 6555.4976165048. The cubic root of 42974549 is about 350.2706722545.

The spelling of 42974549 in words is "forty-two million, nine hundred seventy-four thousand, five hundred forty-nine".