1191451 has 8 divisors (see below), whose sum is σ = 1227744. Its totient is φ = 1155840.

The previous prime is 1191439. The next prime is 1191457. The reversal of 1191451 is 1541911.

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

It is a cyclic number.

It is not a de Polignac number, because 1191451 - 2¹¹ = 1189403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1191457) 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, 6801 + ... + 6973.

It is an arithmetic number, because the mean of its divisors is an integer number (153468).

2^1191451 is an apocalyptic number.

1191451 is a deficient number, since it is larger than the sum of its proper divisors (36293).

1191451 is an equidigital number, since it uses as much as digits as its factorization.

With its successor (1191452) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (341).

1191451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341.

The product of its digits is 180, while the sum is 22.

The square root of 1191451 is about 1091.5360736137. The cubic root of 1191451 is about 106.0129033776.

The spelling of 1191451 in words is "one million, one hundred ninety-one thousand, four hundred fifty-one".