40142761 has 4 divisors (see below), whose sum is σ = 40708224. Its totient is φ = 39577300.

The previous prime is 40142749. The next prime is 40142777. The reversal of 40142761 is 16724104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40142761 - 2²³ = 31754153 is a prime.

It is a super-2 number, since 2×40142761² = 3222882521406242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40142161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282625 + ... + 282766.

It is an arithmetic number, because the mean of its divisors is an integer number (10177056).

Almost surely, 2^40142761 is an apocalyptic number.

It is an amenable number.

40142761 is a deficient number, since it is larger than the sum of its proper divisors (565463).

40142761 is an equidigital number, since it uses as much as digits as its factorization.

40142761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565462.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40142761 is about 6335.8315160680. The cubic root of 40142761 is about 342.4015693848.

Adding to 40142761 its reverse (16724104), we get a palindrome (56866865).

The spelling of 40142761 in words is "forty million, one hundred forty-two thousand, seven hundred sixty-one".