1401621311 has 4 divisors (see below), whose sum is σ = 1462561392. Its totient is φ = 1340681232.

The previous prime is 1401621289. The next prime is 1401621329. The reversal of 1401621311 is 1131261041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1401621311 - 2²² = 1397427007 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 (1401621341) 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 3 ways as a sum of consecutive naturals, for example, 30470006 + ... + 30470051.

It is an arithmetic number, because the mean of its divisors is an integer number (365640348).

Almost surely, 2^1401621311 is an apocalyptic number.

1401621311 is a deficient number, since it is larger than the sum of its proper divisors (60940081).

1401621311 is an equidigital number, since it uses as much as digits as its factorization.

1401621311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60940080.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1401621311 is about 37438.2332782945. The cubic root of 1401621311 is about 1119.1206189826.

Adding to 1401621311 its reverse (1131261041), we get a palindrome (2532882352).

The spelling of 1401621311 in words is "one billion, four hundred one million, six hundred twenty-one thousand, three hundred eleven".