1231970 has 16 divisors (see below), whose sum is σ = 2230200. Its totient is φ = 489984.

The previous prime is 1231961. The next prime is 1231981. The reversal of 1231970 is 791321.

It can be written as a sum of positive squares in 4 ways, for example, as 1054729 + 177241 = 1027^2 + 421^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3314 + ... + 3666.

2^1231970 is an apocalyptic number.

1231970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231970 is a deficient number, since it is larger than the sum of its proper divisors (998230).

1231970 is a wasteful number, since it uses less digits than its factorization.

1231970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1231970 is about 1109.9414398967. The cubic root of 1231970 is about 107.2012980648.

The spelling of 1231970 in words is "one million, two hundred thirty-one thousand, nine hundred seventy".