1401321155 has 16 divisors (see below), whose sum is σ = 1906252320. Its totient is φ = 980356608.

The previous prime is 1401321143. The next prime is 1401321157. The reversal of 1401321155 is 5511231041.

It is a cyclic number.

It is not a de Polignac number, because 1401321155 - 2²² = 1397126851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1401321155.

It is not an unprimeable number, because it can be changed into a prime (1401321157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 566102 + ... + 568571.

It is an arithmetic number, because the mean of its divisors is an integer number (119140770).

Almost surely, 2^1401321155 is an apocalyptic number.

1401321155 is a deficient number, since it is larger than the sum of its proper divisors (504931165).

1401321155 is a wasteful number, since it uses less digits than its factorization.

1401321155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134710.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1401321155 is about 37434.2243809058. The cubic root of 1401321155 is about 1119.0407270395.

Adding to 1401321155 its reverse (5511231041), we get a palindrome (6912552196).

The spelling of 1401321155 in words is "one billion, four hundred one million, three hundred twenty-one thousand, one hundred fifty-five".