1604970 has 48 divisors (see below), whose sum is σ = 4422600. Its totient is φ = 402432.

The previous prime is 1604957. The next prime is 1604983. The reversal of 1604970 is 794061.

It is an interprime number because it is at equal distance from previous prime (1604957) and next prime (1604983).

It can be written as a sum of positive squares in 4 ways, for example, as 1595169 + 9801 = 1263^2 + 99^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006 + ... + 2054.

2^1604970 is an apocalyptic number.

1604970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1604970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211300).

1604970 is an abundant number, since it is smaller than the sum of its proper divisors (2817630).

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

1604970 is a wasteful number, since it uses less digits than its factorization.

1604970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 1604970 is about 1266.8741058211. The cubic root of 1604970 is about 117.0816874203.

The spelling of 1604970 in words is "one million, six hundred four thousand, nine hundred seventy".