1210997 has 8 divisors (see below), whose sum is σ = 1254744. Its totient is φ = 1168128.

The previous prime is 1210987. The next prime is 1210999. The reversal of 1210997 is 7990121.

It can be written as a sum of positive squares in 4 ways, for example, as 42436 + 1168561 = 206^2 + 1081^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210997 - 2⁶ = 1210933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3713 + ... + 4025.

It is an arithmetic number, because the mean of its divisors is an integer number (156843).

2^1210997 is an apocalyptic number.

It is an amenable number.

1210997 is a deficient number, since it is larger than the sum of its proper divisors (43747).

1210997 is an equidigital number, since it uses as much as digits as its factorization.

1210997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 1210997 is about 1100.4530885049. The cubic root of 1210997 is about 106.5894830091.

The spelling of 1210997 in words is "one million, two hundred ten thousand, nine hundred ninety-seven".