1249409 has 4 divisors (see below), whose sum is σ = 1427904. Its totient is φ = 1070916.

The previous prime is 1249403. The next prime is 1249411. The reversal of 1249409 is 9049421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1249409 is a prime.

It is a super-2 number, since 2×1249409² = 3122045698562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1249403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89237 + ... + 89250.

It is an arithmetic number, because the mean of its divisors is an integer number (356976).

2^1249409 is an apocalyptic number.

It is an amenable number.

1249409 is a deficient number, since it is larger than the sum of its proper divisors (178495).

1249409 is an equidigital number, since it uses as much as digits as its factorization.

1249409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178494.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1249409 is about 1117.7696542669. The cubic root of 1249409 is about 107.7047548800.

The spelling of 1249409 in words is "one million, two hundred forty-nine thousand, four hundred nine".