1525431 has 4 divisors (see below), whose sum is σ = 2033912. Its totient is φ = 1016952.

The previous prime is 1525423. The next prime is 1525471. The reversal of 1525431 is 1345251.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1525431 - 2³ = 1525423 is a prime.

It is a super-2 number, since 2×1525431² = 4653879471522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1525398 and 1525407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254236 + ... + 254241.

It is an arithmetic number, because the mean of its divisors is an integer number (508478).

2^1525431 is an apocalyptic number.

1525431 is a deficient number, since it is larger than the sum of its proper divisors (508481).

1525431 is an equidigital number, since it uses as much as digits as its factorization.

1525431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508480.

The product of its digits is 600, while the sum is 21.

The square root of 1525431 is about 1235.0833979938. The cubic root of 1525431 is about 115.1147185424.

The spelling of 1525431 in words is "one million, five hundred twenty-five thousand, four hundred thirty-one".