403040561 has 16 divisors (see below), whose sum is σ = 503726208. Its totient is φ = 313286400.

The previous prime is 403040503. The next prime is 403040587. The reversal of 403040561 is 165040304.

It is a happy number.

It is not a de Polignac number, because 403040561 - 2¹⁴ = 403024177 is a prime.

It is a super-2 number, since 2×403040561² = 324883387622389442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (403042561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26201 + ... + 38633.

It is an arithmetic number, because the mean of its divisors is an integer number (31482888).

Almost surely, 2^403040561 is an apocalyptic number.

It is an amenable number.

403040561 is a deficient number, since it is larger than the sum of its proper divisors (100685647).

403040561 is a wasteful number, since it uses less digits than its factorization.

403040561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12872.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 403040561 is about 20075.8701181294. The cubic root of 403040561 is about 738.6685096157.

Adding to 403040561 its reverse (165040304), we get a palindrome (568080865).

The spelling of 403040561 in words is "four hundred three million, forty thousand, five hundred sixty-one".