1245949 has 4 divisors (see below), whose sum is σ = 1276380. Its totient is φ = 1215520.

The previous prime is 1245943. The next prime is 1245953. The reversal of 1245949 is 9495421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 403225 + 842724 = 635^2 + 918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245949 - 2⁵ = 1245917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245943) 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, 15154 + ... + 15235.

It is an arithmetic number, because the mean of its divisors is an integer number (319095).

2^1245949 is an apocalyptic number.

It is an amenable number.

1245949 is a deficient number, since it is larger than the sum of its proper divisors (30431).

1245949 is an equidigital number, since it uses as much as digits as its factorization.

1245949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30430.

The product of its digits is 12960, while the sum is 34.

The square root of 1245949 is about 1116.2208562825. The cubic root of 1245949 is about 107.6052403670.

The spelling of 1245949 in words is "one million, two hundred forty-five thousand, nine hundred forty-nine".