1401215663 has 8 divisors (see below), whose sum is σ = 1410929520. Its totient is φ = 1391523840.

The previous prime is 1401215659. The next prime is 1401215719. The reversal of 1401215663 is 3665121041.

It is a happy number.

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 1401215663 - 2² = 1401215659 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 (1401215623) 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 7 ways as a sum of consecutive naturals, for example, 134156 + ... + 144222.

It is an arithmetic number, because the mean of its divisors is an integer number (176366190).

Almost surely, 2^1401215663 is an apocalyptic number.

1401215663 is a deficient number, since it is larger than the sum of its proper divisors (9713857).

1401215663 is a wasteful number, since it uses less digits than its factorization.

1401215663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11017.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1401215663 is about 37432.8153229222. The cubic root of 1401215663 is about 1119.0126457282.

The spelling of 1401215663 in words is "one billion, four hundred one million, two hundred fifteen thousand, six hundred sixty-three".