11421731 has 8 divisors (see below), whose sum is σ = 11952384. Its totient is φ = 10893960.

The previous prime is 11421721. The next prime is 11421749. The reversal of 11421731 is 13712411.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11421731 - 2¹⁴ = 11405347 is a prime.

It is a super-2 number, since 2×11421731² = 260911878072722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11421721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14120 + ... + 14906.

It is an arithmetic number, because the mean of its divisors is an integer number (1494048).

Almost surely, 2^11421731 is an apocalyptic number.

11421731 is a deficient number, since it is larger than the sum of its proper divisors (530653).

11421731 is an equidigital number, since it uses as much as digits as its factorization.

11421731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441.

The product of its digits is 168, while the sum is 20.

The square root of 11421731 is about 3379.6051544522. The cubic root of 11421731 is about 225.2046270136.

The spelling of 11421731 in words is "eleven million, four hundred twenty-one thousand, seven hundred thirty-one".