1925639 has 2 divisors, whose sum is σ = 1925640. Its totient is φ = 1925638.

The previous prime is 1925621. The next prime is 1925653. The reversal of 1925639 is 9365291.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1925639 - 2⁸ = 1925383 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1925599 and 1925608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1925039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962819 + 962820.

It is an arithmetic number, because the mean of its divisors is an integer number (962820).

2^1925639 is an apocalyptic number.

1925639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925639 is an equidigital number, since it uses as much as digits as its factorization.

1925639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 35.

The square root of 1925639 is about 1387.6739530596. The cubic root of 1925639 is about 124.4108596717.

The spelling of 1925639 in words is "one million, nine hundred twenty-five thousand, six hundred thirty-nine".