1331630 has 32 divisors (see below), whose sum is σ = 2544480. Its totient is φ = 501120.

The previous prime is 1331611. The next prime is 1331633. The reversal of 1331630 is 361331.

It is a junction number, because it is equal to n+sod(n) for n = 1331599 and 1331608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21800 + ... + 21860.

It is an arithmetic number, because the mean of its divisors is an integer number (79515).

2^1331630 is an apocalyptic number.

1331630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331630 is a deficient number, since it is larger than the sum of its proper divisors (1212850).

1331630 is a wasteful number, since it uses less digits than its factorization.

1331630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1331630 is about 1153.9627377000. The cubic root of 1331630 is about 110.0173526344.

Adding to 1331630 its reverse (361331), we get a palindrome (1692961).

Subtracting from 1331630 its reverse (361331), we obtain a cube (970299 = 99³).

The spelling of 1331630 in words is "one million, three hundred thirty-one thousand, six hundred thirty".