1955191 has 8 divisors (see below), whose sum is σ = 2295200. Its totient is φ = 1630368.

The previous prime is 1955183. The next prime is 1955197. The reversal of 1955191 is 1915591.

1955191 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 1955191 - 2³ = 1955183 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 (1955197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3516 + ... + 4033.

It is an arithmetic number, because the mean of its divisors is an integer number (286900).

2^1955191 is an apocalyptic number.

1955191 is a deficient number, since it is larger than the sum of its proper divisors (340009).

1955191 is an equidigital number, since it uses as much as digits as its factorization.

1955191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7593.

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

The square root of 1955191 is about 1398.2814452034. The cubic root of 1955191 is about 125.0440591352.

The spelling of 1955191 in words is "one million, nine hundred fifty-five thousand, one hundred ninety-one".