401958541 has 2 divisors, whose sum is σ = 401958542. Its totient is φ = 401958540.

The previous prime is 401958521. The next prime is 401958551. The reversal of 401958541 is 145859104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376748100 + 25210441 = 19410^2 + 5021^2 .

It is a cyclic number.

It is not a de Polignac number, because 401958541 - 2²⁵ = 368404109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401958541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401958521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200979270 + 200979271.

It is an arithmetic number, because the mean of its divisors is an integer number (200979271).

Almost surely, 2^401958541 is an apocalyptic number.

It is an amenable number.

401958541 is a deficient number, since it is larger than the sum of its proper divisors (1).

401958541 is an equidigital number, since it uses as much as digits as its factorization.

401958541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 401958541 is about 20048.9037356161. The cubic root of 401958541 is about 738.0068967954.

The spelling of 401958541 in words is "four hundred one million, nine hundred fifty-eight thousand, five hundred forty-one".