1307631 has 8 divisors (see below), whose sum is σ = 1877680. Its totient is φ = 804672.

The previous prime is 1307627. The next prime is 1307633. The reversal of 1307631 is 1367031.

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

It is not a de Polignac number, because 1307631 - 2² = 1307627 is a prime.

It is a super-2 number, since 2×1307631² = 3419797664322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1307598 and 1307607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1307633) 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, 16726 + ... + 16803.

It is an arithmetic number, because the mean of its divisors is an integer number (234710).

2^1307631 is an apocalyptic number.

1307631 is a deficient number, since it is larger than the sum of its proper divisors (570049).

1307631 is a wasteful number, since it uses less digits than its factorization.

1307631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33545.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 1307631 is about 1143.5169434687. The cubic root of 1307631 is about 109.3524210263.

The spelling of 1307631 in words is "one million, three hundred seven thousand, six hundred thirty-one".