1415263891 has 4 divisors (see below), whose sum is σ = 1415343384. Its totient is φ = 1415184400.

The previous prime is 1415263877. The next prime is 1415263897. The reversal of 1415263891 is 1983625141.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1415263891 - 2¹¹ = 1415261843 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1415263897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636 + ... + 53206.

It is an arithmetic number, because the mean of its divisors is an integer number (353835846).

Almost surely, 2^1415263891 is an apocalyptic number.

1415263891 is a deficient number, since it is larger than the sum of its proper divisors (79493).

1415263891 is an equidigital number, since it uses as much as digits as its factorization.

1415263891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79492.

The product of its digits is 51840, while the sum is 40.

The square root of 1415263891 is about 37619.9932349808. The cubic root of 1415263891 is about 1122.7398616718.

The spelling of 1415263891 in words is "one billion, four hundred fifteen million, two hundred sixty-three thousand, eight hundred ninety-one".