1245644 has 12 divisors (see below), whose sum is σ = 2205000. Its totient is φ = 615648.

The previous prime is 1245623. The next prime is 1245649. The reversal of 1245644 is 4465421.

It is not an unprimeable number, because it can be changed into a prime (1245649) 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, 1394 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (183750).

2^1245644 is an apocalyptic number.

It is an amenable number.

1245644 is a deficient number, since it is larger than the sum of its proper divisors (959356).

1245644 is a wasteful number, since it uses less digits than its factorization.

1245644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3592 (or 3590 counting only the distinct ones).

The product of its digits is 3840, while the sum is 26.

The square root of 1245644 is about 1116.0842262123. The cubic root of 1245644 is about 107.5964593022.

The spelling of 1245644 in words is "one million, two hundred forty-five thousand, six hundred forty-four".