1825631 has 2 divisors, whose sum is σ = 1825632. Its totient is φ = 1825630.

The previous prime is 1825627. The next prime is 1825661. The reversal of 1825631 is 1365281.

It is a weak prime.

It is an emirp because it is prime and its reverse (1365281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1825631 - 2² = 1825627 is a prime.

It is a super-2 number, since 2×1825631² = 6665857096322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1825631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1825601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912815 + 912816.

It is an arithmetic number, because the mean of its divisors is an integer number (912816).

2^1825631 is an apocalyptic number.

1825631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1825631 is an equidigital number, since it uses as much as digits as its factorization.

1825631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 1825631 is about 1351.1591320048. The cubic root of 1825631 is about 122.2187020413.

The spelling of 1825631 in words is "one million, eight hundred twenty-five thousand, six hundred thirty-one".