1213975 has 18 divisors (see below), whose sum is σ = 1752864. Its totient is φ = 831600.

The previous prime is 1213951. The next prime is 1213981. The reversal of 1213975 is 5793121.

It is not a de Polignac number, because 1213975 - 2⁵ = 1213943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 730 + ... + 1720.

2^1213975 is an apocalyptic number.

1213975 is a deficient number, since it is larger than the sum of its proper divisors (538889).

1213975 is an equidigital number, since it uses as much as digits as its factorization.

1213975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1003 counting only the distinct ones).

The product of its digits is 1890, while the sum is 28.

The square root of 1213975 is about 1101.8053367088. The cubic root of 1213975 is about 106.6767839796.

It can be divided in two parts, 121 and 3975, that added together give a 12-th power (4096 = 2¹²).

The spelling of 1213975 in words is "one million, two hundred thirteen thousand, nine hundred seventy-five".