1422731 has 4 divisors (see below), whose sum is σ = 1426464. Its totient is φ = 1419000.

The previous prime is 1422727. The next prime is 1422749. The reversal of 1422731 is 1372241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1372241 = 13 ⋅105557.

It is a cyclic number.

It is not a de Polignac number, because 1422731 - 2² = 1422727 is a prime.

It is a super-2 number, since 2×1422731² = 4048326996722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1422721) 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, 1220 + ... + 2081.

It is an arithmetic number, because the mean of its divisors is an integer number (356616).

2^1422731 is an apocalyptic number.

1422731 is a deficient number, since it is larger than the sum of its proper divisors (3733).

1422731 is an equidigital number, since it uses as much as digits as its factorization.

1422731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732.

The product of its digits is 336, while the sum is 20.

The square root of 1422731 is about 1192.7828804942. The cubic root of 1422731 is about 112.4710971018.

Adding to 1422731 its reverse (1372241), we get a palindrome (2794972).

The spelling of 1422731 in words is "one million, four hundred twenty-two thousand, seven hundred thirty-one".