42541957 has 2 divisors, whose sum is σ = 42541958. Its totient is φ = 42541956.

The previous prime is 42541943. The next prime is 42541963. The reversal of 42541957 is 75914524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39614436 + 2927521 = 6294^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 42541957 - 2¹¹ = 42539909 is a prime.

It is equal to p_2578564 and since 42541957 and 2578564 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42541357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21270978 + 21270979.

It is an arithmetic number, because the mean of its divisors is an integer number (21270979).

Almost surely, 2^42541957 is an apocalyptic number.

It is an amenable number.

42541957 is a deficient number, since it is larger than the sum of its proper divisors (1).

42541957 is an equidigital number, since it uses as much as digits as its factorization.

42541957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 42541957 is about 6522.4195663879. The cubic root of 42541957 is about 349.0914038798.

The spelling of 42541957 in words is "forty-two million, five hundred forty-one thousand, nine hundred fifty-seven".