1995651 has 16 divisors (see below), whose sum is σ = 3379200. Its totient is φ = 1140264.

The previous prime is 1995649. The next prime is 1995661. The reversal of 1995651 is 1565991.

1995651 is a `hidden beast` number, since 1 + 99 + 565 + 1 = 666.

It is not a de Polignac number, because 1995651 - 2¹ = 1995649 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1995611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5091 + ... + 5468.

It is an arithmetic number, because the mean of its divisors is an integer number (211200).

2^1995651 is an apocalyptic number.

1995651 is a deficient number, since it is larger than the sum of its proper divisors (1383549).

1995651 is a wasteful number, since it uses less digits than its factorization.

1995651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10575 (or 10569 counting only the distinct ones).

The product of its digits is 12150, while the sum is 36.

The square root of 1995651 is about 1412.6751218875. The cubic root of 1995651 is about 125.9007154378.

The spelling of 1995651 in words is "one million, nine hundred ninety-five thousand, six hundred fifty-one".