1985407 has 2 divisors, whose sum is σ = 1985408. Its totient is φ = 1985406.

The previous prime is 1985377. The next prime is 1985419. The reversal of 1985407 is 7045891.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1985407 - 2⁷ = 1985279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1935407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992703 + 992704.

It is an arithmetic number, because the mean of its divisors is an integer number (992704).

2^1985407 is an apocalyptic number.

1985407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985407 is an equidigital number, since it uses as much as digits as its factorization.

1985407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1985407 is about 1409.0447118527. The cubic root of 1985407 is about 125.6849228575.

The spelling of 1985407 in words is "one million, nine hundred eighty-five thousand, four hundred seven".