1525457 has 4 divisors (see below), whose sum is σ = 1543920. Its totient is φ = 1506996.

The previous prime is 1525423. The next prime is 1525471. The reversal of 1525457 is 7545251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7545251 = 7 ⋅1077893.

It is a cyclic number.

It is not a de Polignac number, because 1525457 - 2¹⁰ = 1524433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1525477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9107 + ... + 9272.

It is an arithmetic number, because the mean of its divisors is an integer number (385980).

2^1525457 is an apocalyptic number.

It is an amenable number.

1525457 is a deficient number, since it is larger than the sum of its proper divisors (18463).

1525457 is an equidigital number, since it uses as much as digits as its factorization.

1525457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18462.

The product of its digits is 7000, while the sum is 29.

The square root of 1525457 is about 1235.0939235540. The cubic root of 1525457 is about 115.1153725578.

The spelling of 1525457 in words is "one million, five hundred twenty-five thousand, four hundred fifty-seven".