1992591 has 6 divisors (see below), whose sum is σ = 2878200. Its totient is φ = 1328388.

The previous prime is 1992589. The next prime is 1992611. The reversal of 1992591 is 1952991.

It is not a de Polignac number, because 1992591 - 2¹ = 1992589 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992691) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110691 + ... + 110708.

It is an arithmetic number, because the mean of its divisors is an integer number (479700).

2^1992591 is an apocalyptic number.

1992591 is a deficient number, since it is larger than the sum of its proper divisors (885609).

1992591 is a wasteful number, since it uses less digits than its factorization.

1992591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221405 (or 221402 counting only the distinct ones).

The product of its digits is 7290, while the sum is 36.

The square root of 1992591 is about 1411.5916548351. The cubic root of 1992591 is about 125.8363332277.

The spelling of 1992591 in words is "one million, nine hundred ninety-two thousand, five hundred ninety-one".