1211397 has 8 divisors (see below), whose sum is σ = 1762080. Its totient is φ = 734160.

The previous prime is 1211393. The next prime is 1211407. The reversal of 1211397 is 7931121.

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

It is not a de Polignac number, because 1211397 - 2² = 1211393 is a prime.

It is a super-3 number, since 3×1211397³ = 5333112390501203319, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211393) 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, 18322 + ... + 18387.

It is an arithmetic number, because the mean of its divisors is an integer number (220260).

2^1211397 is an apocalyptic number.

It is an amenable number.

1211397 is a deficient number, since it is larger than the sum of its proper divisors (550683).

1211397 is a wasteful number, since it uses less digits than its factorization.

1211397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36723.

The product of its digits is 378, while the sum is 24.

The square root of 1211397 is about 1100.6348168216. The cubic root of 1211397 is about 106.6012174449.

The spelling of 1211397 in words is "one million, two hundred eleven thousand, three hundred ninety-seven".