1401382191 has 12 divisors (see below), whose sum is σ = 2053816856. Its totient is φ = 849322320.

The previous prime is 1401382139. The next prime is 1401382207. The reversal of 1401382191 is 1912831041.

It is not a de Polignac number, because 1401382191 - 2¹⁰ = 1401381167 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 (1401382121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1929916 + ... + 1930641.

Almost surely, 2^1401382191 is an apocalyptic number.

1401382191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1401382191 is a deficient number, since it is larger than the sum of its proper divisors (652434665).

1401382191 is a wasteful number, since it uses less digits than its factorization.

1401382191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860582 (or 3860571 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1401382191 is about 37435.0396153123. The cubic root of 1401382191 is about 1119.0569737978.

The spelling of 1401382191 in words is "one billion, four hundred one million, three hundred eighty-two thousand, one hundred ninety-one".