1604745 has 16 divisors (see below), whose sum is σ = 2853120. Its totient is φ = 855792.

The previous prime is 1604737. The next prime is 1604747. The reversal of 1604745 is 5474061.

It is not a de Polignac number, because 1604745 - 2³ = 1604737 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1604747) 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, 5809 + ... + 6078.

It is an arithmetic number, because the mean of its divisors is an integer number (178320).

2^1604745 is an apocalyptic number.

1604745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1604745 is a deficient number, since it is larger than the sum of its proper divisors (1248375).

1604745 is a wasteful number, since it uses less digits than its factorization.

1604745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11901 (or 11895 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1604745 is about 1266.7853014619. The cubic root of 1604745 is about 117.0762159555.

The spelling of 1604745 in words is "one million, six hundred four thousand, seven hundred forty-five".