40661142 has 32 divisors (see below), whose sum is σ = 83212800. Its totient is φ = 13242528.

The previous prime is 40661141. The next prime is 40661143. The reversal of 40661142 is 24116604.

It is an interprime number because it is at equal distance from previous prime (40661141) and next prime (40661143).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40661141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51273 + ... + 52059.

It is an arithmetic number, because the mean of its divisors is an integer number (2600400).

Almost surely, 2^40661142 is an apocalyptic number.

40661142 is an abundant number, since it is smaller than the sum of its proper divisors (42551658).

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

40661142 is a wasteful number, since it uses less digits than its factorization.

40661142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 40661142 is about 6376.6089734278. The cubic root of 40661142 is about 343.8691306320.

Adding to 40661142 its reverse (24116604), we get a palindrome (64777746).

The spelling of 40661142 in words is "forty million, six hundred sixty-one thousand, one hundred forty-two".