1925681 has 2 divisors, whose sum is σ = 1925682. Its totient is φ = 1925680.

The previous prime is 1925653. The next prime is 1925711. The reversal of 1925681 is 1865291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 614656 = 1145^2 + 784^2 .

It is a cyclic number.

It is not a de Polignac number, because 1925681 - 2¹⁸ = 1663537 is a prime.

It is a super-2 number, since 2×1925681² = 7416494627522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1925611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962840 + 962841.

It is an arithmetic number, because the mean of its divisors is an integer number (962841).

2^1925681 is an apocalyptic number.

It is an amenable number.

1925681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925681 is an equidigital number, since it uses as much as digits as its factorization.

1925681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 32.

The square root of 1925681 is about 1387.6890862149. The cubic root of 1925681 is about 124.4117641711.

The spelling of 1925681 in words is "one million, nine hundred twenty-five thousand, six hundred eighty-one".