1231630 has 32 divisors (see below), whose sum is σ = 2384640. Its totient is φ = 456960.

The previous prime is 1231613. The next prime is 1231631. The reversal of 1231630 is 361321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231631) 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, 8922 + ... + 9058.

It is an arithmetic number, because the mean of its divisors is an integer number (74520).

2^1231630 is an apocalyptic number.

1231630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231630 is a deficient number, since it is larger than the sum of its proper divisors (1153010).

1231630 is a wasteful number, since it uses less digits than its factorization.

1231630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1231630 is about 1109.7882680944. The cubic root of 1231630 is about 107.1914353260.

Adding to 1231630 its reverse (361321), we get a palindrome (1592951).

The spelling of 1231630 in words is "one million, two hundred thirty-one thousand, six hundred thirty".