40142747 has 8 divisors (see below), whose sum is σ = 41242176. Its totient is φ = 39053632.

The previous prime is 40142717. The next prime is 40142749. The reversal of 40142747 is 74724104.

40142747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40142747 is a prime.

It is a super-2 number, since 2×40142747² = 3222880273412018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40142749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5663 + ... + 10599.

It is an arithmetic number, because the mean of its divisors is an integer number (5155272).

Almost surely, 2^40142747 is an apocalyptic number.

40142747 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

40142747 is a deficient number, since it is larger than the sum of its proper divisors (1099429).

40142747 is a wasteful number, since it uses less digits than its factorization.

40142747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5157.

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 40142747 is about 6335.8304112405. The cubic root of 40142747 is about 342.4015295800.

The spelling of 40142747 in words is "forty million, one hundred forty-two thousand, seven hundred forty-seven".