1247099 has 12 divisors (see below), whose sum is σ = 1499328. Its totient is φ = 1033200.

The previous prime is 1247089. The next prime is 1247101. The reversal of 1247099 is 9907421.

It is not a de Polignac number, because 1247099 - 2¹² = 1243003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247009) 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, 1109 + ... + 1929.

It is an arithmetic number, because the mean of its divisors is an integer number (124944).

2^1247099 is an apocalyptic number.

1247099 is a deficient number, since it is larger than the sum of its proper divisors (252229).

1247099 is an equidigital number, since it uses as much as digits as its factorization.

1247099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1247099 is about 1116.7358685025. The cubic root of 1247099 is about 107.6383364177.

The spelling of 1247099 in words is "one million, two hundred forty-seven thousand, ninety-nine".