1642725 has 54 divisors (see below), whose sum is σ = 3445650. Its totient is φ = 745920.

The previous prime is 1642723. The next prime is 1642741. The reversal of 1642725 is 5272461.

It can be written as a sum of positive squares in 3 ways, for example, as 1764 + 1640961 = 42^2 + 1281^2 .

It is not a de Polignac number, because 1642725 - 2¹ = 1642723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642723) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 10951 + ... + 11099.

2^1642725 is an apocalyptic number.

1642725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1642725 is an abundant number, since it is smaller than the sum of its proper divisors (1802925).

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

1642725 is a wasteful number, since it uses less digits than its factorization.

1642725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 164 counting only the distinct ones).

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

The square root of 1642725 is about 1281.6883396520. The cubic root of 1642725 is about 117.9926501215.

The spelling of 1642725 in words is "one million, six hundred forty-two thousand, seven hundred twenty-five".