40557061 has 2 divisors, whose sum is σ = 40557062. Its totient is φ = 40557060.

The previous prime is 40557029. The next prime is 40557071. The reversal of 40557061 is 16075504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35034561 + 5522500 = 5919^2 + 2350^2 .

It is a cyclic number.

It is not a de Polignac number, because 40557061 - 2⁵ = 40557029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40557071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20278530 + 20278531.

It is an arithmetic number, because the mean of its divisors is an integer number (20278531).

Almost surely, 2^40557061 is an apocalyptic number.

It is an amenable number.

40557061 is a deficient number, since it is larger than the sum of its proper divisors (1).

40557061 is an equidigital number, since it uses as much as digits as its factorization.

40557061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 40557061 is about 6368.4425882628. The cubic root of 40557061 is about 343.5754774261.

The spelling of 40557061 in words is "forty million, five hundred fifty-seven thousand, sixty-one".