1997525 has 6 divisors (see below), whose sum is σ = 2476962. Its totient is φ = 1598000.

The previous prime is 1997507. The next prime is 1997531. The reversal of 1997525 is 5257991.

It can be written as a sum of positive squares in 3 ways, for example, as 54289 + 1943236 = 233^2 + 1394^2 .

It is not a de Polignac number, because 1997525 - 2⁸ = 1997269 is a prime.

It is a super-2 number, since 2×1997525² = 7980212251250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39926 + ... + 39975.

It is an arithmetic number, because the mean of its divisors is an integer number (412827).

2^1997525 is an apocalyptic number.

It is an amenable number.

1997525 is a deficient number, since it is larger than the sum of its proper divisors (479437).

1997525 is an equidigital number, since it uses as much as digits as its factorization.

1997525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79911 (or 79906 counting only the distinct ones).

The product of its digits is 28350, while the sum is 38.

The square root of 1997525 is about 1413.3382468468. The cubic root of 1997525 is about 125.9401117931.

The spelling of 1997525 in words is "one million, nine hundred ninety-seven thousand, five hundred twenty-five".