1999995 has 16 divisors (see below), whose sum is σ = 3224832. Its totient is φ = 1058400.

The previous prime is 1999993. The next prime is 2000003. The reversal of 1999995 is 5999991.

It is not a de Polignac number, because 1999995 - 2¹ = 1999993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1999993) 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, 1824 + ... + 2706.

It is an arithmetic number, because the mean of its divisors is an integer number (201552).

2^1999995 is an apocalyptic number.

1999995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1999995 is a deficient number, since it is larger than the sum of its proper divisors (1224837).

1999995 is a wasteful number, since it uses less digits than its factorization.

1999995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042.

The product of its digits is 295245, while the sum is 51.

The square root of 1999995 is about 1414.2117946050. The cubic root of 1999995 is about 125.9919999960.

The spelling of 1999995 in words is "one million, nine hundred ninety-nine thousand, nine hundred ninety-five".