42031049 has 4 divisors (see below), whose sum is σ = 42447300. Its totient is φ = 41614800.

The previous prime is 42031039. The next prime is 42031079. The reversal of 42031049 is 94013024.

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 35940025 + 6091024 = 5995^2 + 2468^2 .

It is a cyclic number.

It is not a de Polignac number, because 42031049 - 2¹⁶ = 41965513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42031039) 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, 207974 + ... + 208175.

It is an arithmetic number, because the mean of its divisors is an integer number (10611825).

Almost surely, 2^42031049 is an apocalyptic number.

It is an amenable number.

42031049 is a deficient number, since it is larger than the sum of its proper divisors (416251).

42031049 is a wasteful number, since it uses less digits than its factorization.

42031049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416250.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42031049 is about 6483.1357382057. The cubic root of 42031049 is about 347.6882998591.

The spelling of 42031049 in words is "forty-two million, thirty-one thousand, forty-nine".