1401165191 has 8 divisors (see below), whose sum is σ = 1453947264. Its totient is φ = 1349301240.

The previous prime is 1401165151. The next prime is 1401165197. The reversal of 1401165191 is 1915611041.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401165191 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 (1401165197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226421 + ... + 232526.

It is an arithmetic number, because the mean of its divisors is an integer number (181743408).

Almost surely, 2^1401165191 is an apocalyptic number.

1401165191 is a deficient number, since it is larger than the sum of its proper divisors (52782073).

1401165191 is an equidigital number, since it uses as much as digits as its factorization.

1401165191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459061.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 1401165191 is about 37432.1411490179. The cubic root of 1401165191 is about 1118.9992098987. Note that the first 3 decimals are identical.

The spelling of 1401165191 in words is "one billion, four hundred one million, one hundred sixty-five thousand, one hundred ninety-one".