1249845 has 16 divisors (see below), whose sum is σ = 2022720. Its totient is φ = 658944.

The previous prime is 1249841. The next prime is 1249847. The reversal of 1249845 is 5489421.

It is not a de Polignac number, because 1249845 - 2² = 1249841 is a prime.

It is a super-2 number, since 2×1249845² = 3124225048050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1026 + ... + 1884.

It is an arithmetic number, because the mean of its divisors is an integer number (126420).

2^1249845 is an apocalyptic number.

1249845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1249845 is a deficient number, since it is larger than the sum of its proper divisors (772875).

1249845 is an equidigital number, since it uses as much as digits as its factorization.

1249845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964.

The product of its digits is 11520, while the sum is 33.

The square root of 1249845 is about 1117.9646684936. The cubic root of 1249845 is about 107.7172818192.

The spelling of 1249845 in words is "one million, two hundred forty-nine thousand, eight hundred forty-five".