1220931 has 12 divisors (see below), whose sum is σ = 1773408. Its totient is φ = 809424.

The previous prime is 1220927. The next prime is 1220953. The reversal of 1220931 is 1390221.

It is a happy number.

It is not a de Polignac number, because 1220931 - 2² = 1220927 is a prime.

It is a super-2 number, since 2×1220931² = 2981345013522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2406 + ... + 2868.

It is an arithmetic number, because the mean of its divisors is an integer number (147784).

2^1220931 is an apocalyptic number.

1220931 is a deficient number, since it is larger than the sum of its proper divisors (552477).

1220931 is a wasteful number, since it uses less digits than its factorization.

1220931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1220931 is about 1104.9574652447. The cubic root of 1220931 is about 106.8801464640.

The spelling of 1220931 in words is "one million, two hundred twenty thousand, nine hundred thirty-one".