1525897 has 4 divisors (see below), whose sum is σ = 1563156. Its totient is φ = 1488640.

The previous prime is 1525877. The next prime is 1525921. The reversal of 1525897 is 7985251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7985251 = 73 ⋅109387.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 1207801 = 564^2 + 1099^2 .

It is a cyclic number.

It is not a de Polignac number, because 1525897 - 2¹¹ = 1523849 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1525837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18568 + ... + 18649.

It is an arithmetic number, because the mean of its divisors is an integer number (390789).

2^1525897 is an apocalyptic number.

It is an amenable number.

1525897 is a deficient number, since it is larger than the sum of its proper divisors (37259).

1525897 is an equidigital number, since it uses as much as digits as its factorization.

1525897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37258.

The product of its digits is 25200, while the sum is 37.

The square root of 1525897 is about 1235.2720348166. The cubic root of 1525897 is about 115.1264393823.

The spelling of 1525897 in words is "one million, five hundred twenty-five thousand, eight hundred ninety-seven".