1229931 has 8 divisors (see below), whose sum is σ = 1822160. Its totient is φ = 819936.

The previous prime is 1229911. The next prime is 1229939. The reversal of 1229931 is 1399221.

It is not a de Polignac number, because 1229931 - 2¹⁰ = 1228907 is a prime.

It is a super-2 number, since 2×1229931² = 3025460529522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 45553 = 1229931 / (1 + 2 + 2 + 9 + 9 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1229895 and 1229904.

It is not an unprimeable number, because it can be changed into a prime (1229939) 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, 22750 + ... + 22803.

It is an arithmetic number, because the mean of its divisors is an integer number (227770).

2^1229931 is an apocalyptic number.

1229931 is a deficient number, since it is larger than the sum of its proper divisors (592229).

1229931 is an equidigital number, since it uses as much as digits as its factorization.

1229931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45562 (or 45556 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 1229931 is about 1109.0225426023. The cubic root of 1229931 is about 107.1421234235.

The spelling of 1229931 in words is "one million, two hundred twenty-nine thousand, nine hundred thirty-one".