1356249 has 4 divisors (see below), whose sum is σ = 1808336. Its totient is φ = 904164.

The previous prime is 1356247. The next prime is 1356253. The reversal of 1356249 is 9426531.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9426531 = 3 ⋅3142177.

It is not a de Polignac number, because 1356249 - 2¹ = 1356247 is a prime.

It is a super-2 number, since 2×1356249² = 3678822700002, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226039 + ... + 226044.

It is an arithmetic number, because the mean of its divisors is an integer number (452084).

2^1356249 is an apocalyptic number.

It is an amenable number.

1356249 is a deficient number, since it is larger than the sum of its proper divisors (452087).

1356249 is an equidigital number, since it uses as much as digits as its factorization.

1356249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452086.

The product of its digits is 6480, while the sum is 30.

The square root of 1356249 is about 1164.5810405463. The cubic root of 1356249 is about 110.6912122374.

The spelling of 1356249 in words is "one million, three hundred fifty-six thousand, two hundred forty-nine".