42511406 has 48 divisors (see below), whose sum is σ = 79156224. Its totient is φ = 16734432.

The previous prime is 42511397. The next prime is 42511423. The reversal of 42511406 is 60411524.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 802076 + ... + 802128.

It is an arithmetic number, because the mean of its divisors is an integer number (1649088).

Almost surely, 2^42511406 is an apocalyptic number.

42511406 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

42511406 is a deficient number, since it is larger than the sum of its proper divisors (36644818).

42511406 is a wasteful number, since it uses less digits than its factorization.

42511406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 42511406 is about 6520.0771467829. The cubic root of 42511406 is about 349.0078185893.

The spelling of 42511406 in words is "forty-two million, five hundred eleven thousand, four hundred six".