1229992 has 8 divisors (see below), whose sum is σ = 2306250. Its totient is φ = 614992.

The previous prime is 1229981. The next prime is 1229993. The reversal of 1229992 is 2999221.

It can be written as a sum of positive squares in only one way, i.e., 1136356 + 93636 = 1066^2 + 306^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1229993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76867 + ... + 76882.

2^1229992 is an apocalyptic number.

It is an amenable number.

1229992 is a deficient number, since it is larger than the sum of its proper divisors (1076258).

1229992 is a wasteful number, since it uses less digits than its factorization.

1229992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153755 (or 153751 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 1229992 is about 1109.0500439565. The cubic root of 1229992 is about 107.1438946778.

The spelling of 1229992 in words is "one million, two hundred twenty-nine thousand, nine hundred ninety-two".