1955911 has 4 divisors (see below), whose sum is σ = 1958824. Its totient is φ = 1953000.

The previous prime is 1955893. The next prime is 1955939. The reversal of 1955911 is 1195591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1195591 = 1021 ⋅1171.

It is a cyclic number.

It is not a de Polignac number, because 1955911 - 2⁹ = 1955399 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 (1955711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121 + ... + 1981.

It is an arithmetic number, because the mean of its divisors is an integer number (489706).

2^1955911 is an apocalyptic number.

1955911 is a deficient number, since it is larger than the sum of its proper divisors (2913).

1955911 is a wasteful number, since it uses less digits than its factorization.

1955911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912.

The product of its digits is 2025, while the sum is 31.

The square root of 1955911 is about 1398.5388804034. The cubic root of 1955911 is about 125.0594064292.

The spelling of 1955911 in words is "one million, nine hundred fifty-five thousand, nine hundred eleven".