40942513 has 4 divisors (see below), whose sum is σ = 40968180. Its totient is φ = 40916848.

The previous prime is 40942483. The next prime is 40942523. The reversal of 40942513 is 31524904.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20584369 + 20358144 = 4537^2 + 4512^2 .

It is a cyclic number.

It is not a de Polignac number, because 40942513 - 2⁵ = 40942481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40942523) 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, 10270 + ... + 13687.

It is an arithmetic number, because the mean of its divisors is an integer number (10242045).

Almost surely, 2^40942513 is an apocalyptic number.

It is an amenable number.

40942513 is a deficient number, since it is larger than the sum of its proper divisors (25667).

40942513 is a wasteful number, since it uses less digits than its factorization.

40942513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25666.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40942513 is about 6398.6336822794. The cubic root of 40942513 is about 344.6604879544.

The spelling of 40942513 in words is "forty million, nine hundred forty-two thousand, five hundred thirteen".