1631325 has 12 divisors (see below), whose sum is σ = 2697248. Its totient is φ = 870000.

The previous prime is 1631309. The next prime is 1631341. The reversal of 1631325 is 5231361.

It is an interprime number because it is at equal distance from previous prime (1631309) and next prime (1631341).

It is not a de Polignac number, because 1631325 - 2⁴ = 1631309 is a prime.

It is a super-2 number, since 2×1631325² = 5322442511250, which contains 22 as substring.

It is a Duffinian number.

1631325 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10801 + ... + 10950.

2^1631325 is an apocalyptic number.

1631325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1631325 is a deficient number, since it is larger than the sum of its proper divisors (1065923).

1631325 is a wasteful number, since it uses less digits than its factorization.

1631325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21764 (or 21759 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 1631325 is about 1277.2333381180. The cubic root of 1631325 is about 117.7190722096.

Adding to 1631325 its reverse (5231361), we get a palindrome (6862686).

The spelling of 1631325 in words is "one million, six hundred thirty-one thousand, three hundred twenty-five".