1961995 has 16 divisors (see below), whose sum is σ = 2784960. Its totient is φ = 1298304.

The previous prime is 1961989. The next prime is 1962001. The reversal of 1961995 is 5991691.

It is an interprime number because it is at equal distance from previous prime (1961989) and next prime (1962001).

It is not a de Polignac number, because 1961995 - 2⁵ = 1961963 is a prime.

1961995 is a lucky number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49 + ... + 1981.

It is an arithmetic number, because the mean of its divisors is an integer number (174060).

2^1961995 is an apocalyptic number.

1961995 is a deficient number, since it is larger than the sum of its proper divisors (822965).

1961995 is a wasteful number, since it uses less digits than its factorization.

1961995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974.

The product of its digits is 21870, while the sum is 40.

The square root of 1961995 is about 1400.7123187864. The cubic root of 1961995 is about 125.1889409334.

The spelling of 1961995 in words is "one million, nine hundred sixty-one thousand, nine hundred ninety-five".