42465391 has 4 divisors (see below), whose sum is σ = 42480432. Its totient is φ = 42450352.

The previous prime is 42465359. The next prime is 42465407. The reversal of 42465391 is 19356424.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42465391 - 2⁵ = 42465359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42465331) 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, 1870 + ... + 9403.

It is an arithmetic number, because the mean of its divisors is an integer number (10620108).

Almost surely, 2^42465391 is an apocalyptic number.

42465391 is a deficient number, since it is larger than the sum of its proper divisors (15041).

42465391 is a wasteful number, since it uses less digits than its factorization.

42465391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15040.

The product of its digits is 25920, while the sum is 34.

The square root of 42465391 is about 6516.5474754658. The cubic root of 42465391 is about 348.8818493170.

The spelling of 42465391 in words is "forty-two million, four hundred sixty-five thousand, three hundred ninety-one".