401240523 has 4 divisors (see below), whose sum is σ = 534987368. Its totient is φ = 267493680.

The previous prime is 401240519. The next prime is 401240563. The reversal of 401240523 is 325042104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 401240523 - 2² = 401240519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401240523.

It is not an unprimeable number, because it can be changed into a prime (401240503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66873418 + ... + 66873423.

It is an arithmetic number, because the mean of its divisors is an integer number (133746842).

Almost surely, 2^401240523 is an apocalyptic number.

401240523 is a deficient number, since it is larger than the sum of its proper divisors (133746845).

401240523 is a wasteful number, since it uses less digits than its factorization.

401240523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133746844.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 401240523 is about 20030.9890669432. The cubic root of 401240523 is about 737.5672013072.

Adding to 401240523 its reverse (325042104), we get a palindrome (726282627).

The spelling of 401240523 in words is "four hundred one million, two hundred forty thousand, five hundred twenty-three".