1249897 has 12 divisors (see below), whose sum is σ = 1418256. Its totient is φ = 1092240.

The previous prime is 1249873. The next prime is 1249901. The reversal of 1249897 is 7989421.

It is a de Polignac number, because none of the positive numbers 2^k-1249897 is a prime.

It is a Duffinian number.

Its product of digits (36288) is a multiple of the sum of its prime factors (168).

It is not an unprimeable number, because it can be changed into a prime (1249817) 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, 15018 + ... + 15100.

It is an arithmetic number, because the mean of its divisors is an integer number (118188).

2^1249897 is an apocalyptic number.

1249897 is the 913-rd pentagonal number.

It is an amenable number.

1249897 is a deficient number, since it is larger than the sum of its proper divisors (168359).

1249897 is an equidigital number, since it uses as much as digits as its factorization.

1249897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 131 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 1249897 is about 1117.9879248006. The cubic root of 1249897 is about 107.7187756633.

The spelling of 1249897 in words is "one million, two hundred forty-nine thousand, eight hundred ninety-seven".