1213970 has 32 divisors (see below), whose sum is σ = 2388528. Its totient is φ = 442368.

The previous prime is 1213951. The next prime is 1213981. The reversal of 1213970 is 793121.

It can be written as a sum of positive squares in 8 ways, for example, as 808201 + 405769 = 899^2 + 637^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6194 + ... + 6386.

2^1213970 is an apocalyptic number.

1213970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213970 is a deficient number, since it is larger than the sum of its proper divisors (1174558).

1213970 is a wasteful number, since it uses less digits than its factorization.

1213970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254.

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

The square root of 1213970 is about 1101.8030677031. The cubic root of 1213970 is about 106.6766375228.

The spelling of 1213970 in words is "one million, two hundred thirteen thousand, nine hundred seventy".