42091034 has 4 divisors (see below), whose sum is σ = 63136554. Its totient is φ = 21045516.

The previous prime is 42091033. The next prime is 42091039. The reversal of 42091034 is 43019024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36638809 + 5452225 = 6053^2 + 2335^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42091033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10522757 + ... + 10522760.

Almost surely, 2^42091034 is an apocalyptic number.

42091034 is a deficient number, since it is larger than the sum of its proper divisors (21045520).

42091034 is a wasteful number, since it uses less digits than its factorization.

42091034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21045519.

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

The square root of 42091034 is about 6487.7603223300. The cubic root of 42091034 is about 347.8536234264.

The spelling of 42091034 in words is "forty-two million, ninety-one thousand, thirty-four".