40042254 has 32 divisors (see below), whose sum is σ = 92102400. Its totient is φ = 11368512.

The previous prime is 40042231. The next prime is 40042273. The reversal of 40042254 is 45224004.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40042254.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3922 + ... + 9770.

It is an arithmetic number, because the mean of its divisors is an integer number (2878200).

Almost surely, 2^40042254 is an apocalyptic number.

40042254 is an abundant number, since it is smaller than the sum of its proper divisors (52060146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40042254 is a wasteful number, since it uses less digits than its factorization.

40042254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6024.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40042254 is about 6327.8949106318. The cubic root of 40042254 is about 342.1155691636.

Adding to 40042254 its reverse (45224004), we get a palindrome (85266258).

The spelling of 40042254 in words is "forty million, forty-two thousand, two hundred fifty-four".