40251042 has 48 divisors (see below), whose sum is σ = 96478200. Its totient is φ = 12047616.

The previous prime is 40251041. The next prime is 40251047. The reversal of 40251042 is 24015204.

It can be written as a sum of positive squares in 4 ways, for example, as 40182921 + 68121 = 6339^2 + 261^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (40251041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6334 + ... + 10982.

Almost surely, 2^40251042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40251042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48239100).

40251042 is an abundant number, since it is smaller than the sum of its proper divisors (56227158).

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

40251042 is a wasteful number, since it uses less digits than its factorization.

40251042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4707 (or 4704 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40251042 is about 6344.3708907976. The cubic root of 40251042 is about 342.7091574149.

Adding to 40251042 its reverse (24015204), we get a palindrome (64266246).

The spelling of 40251042 in words is "forty million, two hundred fifty-one thousand, forty-two".