40421142 has 12 divisors (see below), whose sum is σ = 87579180. Its totient is φ = 13473708.

The previous prime is 40421141. The next prime is 40421153. The reversal of 40421142 is 24112404.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2245619 = 40421142 / (4 + 0 + 4 + 2 + 1 + 1 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122792 + ... + 1122827.

It is an arithmetic number, because the mean of its divisors is an integer number (7298265).

Almost surely, 2^40421142 is an apocalyptic number.

40421142 is an abundant number, since it is smaller than the sum of its proper divisors (47158038).

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

40421142 is a wasteful number, since it uses less digits than its factorization.

40421142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245627 (or 2245624 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 40421142 is about 6357.7623422081. The cubic root of 40421142 is about 343.1912393643.

Adding to 40421142 its reverse (24112404), we get a palindrome (64533546).

It can be divided in two parts, 4042 and 1142, that added together give a square (5184 = 72²).

The spelling of 40421142 in words is "forty million, four hundred twenty-one thousand, one hundred forty-two".