1564725 has 24 divisors (see below), whose sum is σ = 2674432. Its totient is φ = 806400.

The previous prime is 1564721. The next prime is 1564729. The reversal of 1564725 is 5274651.

It is an interprime number because it is at equal distance from previous prime (1564721) and next prime (1564729).

It is not a de Polignac number, because 1564725 - 2² = 1564721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1564692 and 1564701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1564721) 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 23 ways as a sum of consecutive naturals, for example, 1989 + ... + 2661.

2^1564725 is an apocalyptic number.

1564725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1564725 is a deficient number, since it is larger than the sum of its proper divisors (1109707).

1564725 is a wasteful number, since it uses less digits than its factorization.

1564725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 712 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 1564725 is about 1250.8896833854. The cubic root of 1564725 is about 116.0947749037.

The spelling of 1564725 in words is "one million, five hundred sixty-four thousand, seven hundred twenty-five".