401240501 has 2 divisors, whose sum is σ = 401240502. Its totient is φ = 401240500.

The previous prime is 401240431. The next prime is 401240503. The reversal of 401240501 is 105042104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401200900 + 39601 = 20030^2 + 199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401240501 is a prime.

Together with 401240503, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401240501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401240503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200620250 + 200620251.

It is an arithmetic number, because the mean of its divisors is an integer number (200620251).

Almost surely, 2^401240501 is an apocalyptic number.

It is an amenable number.

401240501 is a deficient number, since it is larger than the sum of its proper divisors (1).

401240501 is an equidigital number, since it uses as much as digits as its factorization.

401240501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 401240501 is about 20030.9885177941. The cubic root of 401240501 is about 737.5671878270.

Adding to 401240501 its reverse (105042104), we get a palindrome (506282605).

The spelling of 401240501 in words is "four hundred one million, two hundred forty thousand, five hundred one".