1965951 has 20 divisors (see below), whose sum is σ = 3164392. Its totient is φ = 1209168.

The previous prime is 1965941. The next prime is 1965959. The reversal of 1965951 is 1595691.

It is not a de Polignac number, because 1965951 - 2¹⁰ = 1964927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 120 + ... + 1986.

2^1965951 is an apocalyptic number.

1965951 is a deficient number, since it is larger than the sum of its proper divisors (1198441).

1965951 is a wasteful number, since it uses less digits than its factorization.

1965951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892 (or 1883 counting only the distinct ones).

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

The square root of 1965951 is about 1402.1237463220. The cubic root of 1965951 is about 125.2730245599.

It can be divided in two parts, 1965 and 951, that added together give a square (2916 = 54²).

The spelling of 1965951 in words is "one million, nine hundred sixty-five thousand, nine hundred fifty-one".