11401431 has 4 divisors (see below), whose sum is σ = 15201912. Its totient is φ = 7600952.

The previous prime is 11401427. The next prime is 11401447. The reversal of 11401431 is 13410411.

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

It is a cyclic number.

It is not a de Polignac number, because 11401431 - 2² = 11401427 is a prime.

It is a super-2 number, since 2×11401431² = 259985257695522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11401431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11401451) 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, 1900236 + ... + 1900241.

It is an arithmetic number, because the mean of its divisors is an integer number (3800478).

Almost surely, 2^11401431 is an apocalyptic number.

11401431 is a deficient number, since it is larger than the sum of its proper divisors (3800481).

11401431 is an equidigital number, since it uses as much as digits as its factorization.

11401431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800480.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 11401431 is about 3376.6005093881. The cubic root of 11401431 is about 225.0711281295.

Adding to 11401431 its reverse (13410411), we get a palindrome (24811842).

The spelling of 11401431 in words is "eleven million, four hundred one thousand, four hundred thirty-one".