42391011 has 32 divisors (see below), whose sum is σ = 64733760. Its totient is φ = 24482304.

The previous prime is 42391003. The next prime is 42391057. The reversal of 42391011 is 11019324.

It is not a de Polignac number, because 42391011 - 2³ = 42391003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42391091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41341 + ... + 42353.

It is an arithmetic number, because the mean of its divisors is an integer number (2022930).

Almost surely, 2^42391011 is an apocalyptic number.

42391011 is a deficient number, since it is larger than the sum of its proper divisors (22342749).

42391011 is a wasteful number, since it uses less digits than its factorization.

42391011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 42391011 is about 6510.8379645020. The cubic root of 42391011 is about 348.6780363071.

The spelling of 42391011 in words is "forty-two million, three hundred ninety-one thousand, eleven".