1345631 has 4 divisors (see below), whose sum is σ = 1537872. Its totient is φ = 1153392.

The previous prime is 1345627. The next prime is 1345633. The reversal of 1345631 is 1365431.

It is a happy number.

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 1345631 - 2² = 1345627 is a prime.

It is a super-2 number, since 2×1345631² = 3621445576322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1345597 and 1345606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345633) 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, 96110 + ... + 96123.

It is an arithmetic number, because the mean of its divisors is an integer number (384468).

2^1345631 is an apocalyptic number.

1345631 is a deficient number, since it is larger than the sum of its proper divisors (192241).

1345631 is an equidigital number, since it uses as much as digits as its factorization.

1345631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192240.

The product of its digits is 1080, while the sum is 23.

The square root of 1345631 is about 1160.0133619920. The cubic root of 1345631 is about 110.4015899354.

The spelling of 1345631 in words is "one million, three hundred forty-five thousand, six hundred thirty-one".