1011995 has 8 divisors (see below), whose sum is σ = 1253760. Its totient is φ = 783360.

The previous prime is 1011979. The next prime is 1012007. The reversal of 1011995 is 5991101.

1011995 = 96² + 97² + ... + 157².

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1011995 - 2⁴ = 1011979 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3110 + ... + 3419.

It is an arithmetic number, because the mean of its divisors is an integer number (156720).

2^1011995 is an apocalyptic number.

1011995 is a deficient number, since it is larger than the sum of its proper divisors (241765).

1011995 is an equidigital number, since it uses as much as digits as its factorization.

1011995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6565.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 1011995 is about 1005.9796220600. The cubic root of 1011995 is about 100.3982452353.

The spelling of 1011995 in words is "one million, eleven thousand, nine hundred ninety-five".