1951191 has 12 divisors (see below), whose sum is σ = 3074760. Its totient is φ = 1182480.

The previous prime is 1951177. The next prime is 1951193. The reversal of 1951191 is 1911591.

It is not a de Polignac number, because 1951191 - 2⁶ = 1951127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1951193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9756 + ... + 9953.

It is an arithmetic number, because the mean of its divisors is an integer number (256230).

2^1951191 is an apocalyptic number.

1951191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1951191 is a deficient number, since it is larger than the sum of its proper divisors (1123569).

1951191 is a wasteful number, since it uses less digits than its factorization.

1951191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19726 (or 19723 counting only the distinct ones).

The product of its digits is 405, while the sum is 27.

The square root of 1951191 is about 1396.8503856892. The cubic root of 1951191 is about 124.9587277076.

The spelling of 1951191 in words is "one million, nine hundred fifty-one thousand, one hundred ninety-one".