191275456 has 56 divisors (see below), whose sum is σ = 394451840. Its totient is φ = 91929600.

The previous prime is 191275453. The next prime is 191275457. The reversal of 191275456 is 654572191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191275453) 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, 454126 + ... + 454546.

Almost surely, 2^191275456 is an apocalyptic number.

191275456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191275456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197225920).

191275456 is an abundant number, since it is smaller than the sum of its proper divisors (203176384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191275456 is a wasteful number, since it uses less digits than its factorization.

191275456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 683 counting only the distinct ones).

The product of its digits is 75600, while the sum is 40.

The square root of 191275456 is about 13830.2370189379. The cubic root of 191275456 is about 576.1732375010.

The spelling of 191275456 in words is "one hundred ninety-one million, two hundred seventy-five thousand, four hundred fifty-six".