1231600 has 30 divisors (see below), whose sum is σ = 2959880. Its totient is φ = 492480.

The previous prime is 1231597. The next prime is 1231613. The reversal of 1231600 is 61321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1140 + ... + 1939.

2^1231600 is an apocalyptic number.

1231600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231600 is an abundant number, since it is smaller than the sum of its proper divisors (1728280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231600 is a wasteful number, since it uses less digits than its factorization.

1231600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097 (or 3086 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1231600 is about 1109.7747519204. The cubic root of 1231600 is about 107.1905649972.

Adding to 1231600 its reverse (61321), we get a palindrome (1292921).

The spelling of 1231600 in words is "one million, two hundred thirty-one thousand, six hundred".