40642741 has 2 divisors, whose sum is σ = 40642742. Its totient is φ = 40642740.

The previous prime is 40642711. The next prime is 40642757. The reversal of 40642741 is 14724604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40640625 + 2116 = 6375^2 + 46^2 .

It is a cyclic number.

It is not a de Polignac number, because 40642741 - 2⁹ = 40642229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40642711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20321370 + 20321371.

It is an arithmetic number, because the mean of its divisors is an integer number (20321371).

Almost surely, 2^40642741 is an apocalyptic number.

It is an amenable number.

40642741 is a deficient number, since it is larger than the sum of its proper divisors (1).

40642741 is an equidigital number, since it uses as much as digits as its factorization.

40642741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 40642741 is about 6375.1659586241. The cubic root of 40642741 is about 343.8172507101.

The spelling of 40642741 in words is "forty million, six hundred forty-two thousand, seven hundred forty-one".