1245564 has 48 divisors (see below), whose sum is σ = 3404800. Its totient is φ = 392688.

The previous prime is 1245557. The next prime is 1245589. The reversal of 1245564 is 4655421.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1749 + ... + 2355.

2^1245564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702400).

1245564 is an abundant number, since it is smaller than the sum of its proper divisors (2159236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245564 is a wasteful number, since it uses less digits than its factorization.

1245564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 631 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1245564 is about 1116.0483860478. The cubic root of 1245564 is about 107.5941558348.

The spelling of 1245564 in words is "one million, two hundred forty-five thousand, five hundred sixty-four".