40425641 has 2 divisors, whose sum is σ = 40425642. Its totient is φ = 40425640.

The previous prime is 40425617. The next prime is 40425647. The reversal of 40425641 is 14652404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23078416 + 17347225 = 4804^2 + 4165^2 .

It is a cyclic number.

It is not a de Polignac number, because 40425641 - 2⁶ = 40425577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40425641.

It is not a weakly prime, because it can be changed into another prime (40425647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20212820 + 20212821.

It is an arithmetic number, because the mean of its divisors is an integer number (20212821).

Almost surely, 2^40425641 is an apocalyptic number.

It is an amenable number.

40425641 is a deficient number, since it is larger than the sum of its proper divisors (1).

40425641 is an equidigital number, since it uses as much as digits as its factorization.

40425641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 40425641 is about 6358.1161518173. The cubic root of 40425641 is about 343.2039716460.

The spelling of 40425641 in words is "forty million, four hundred twenty-five thousand, six hundred forty-one".