1401334021 has 8 divisors (see below), whose sum is σ = 1484279640. Its totient is φ = 1318445568.

The previous prime is 1401334003. The next prime is 1401334031. The reversal of 1401334021 is 1204331041.

It can be written as a sum of positive squares in 4 ways, for example, as 710222500 + 691111521 = 26650^2 + 26289^2 .

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 1401334021 - 2¹¹ = 1401331973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1401334021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401334031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42715 + ... + 68023.

It is an arithmetic number, because the mean of its divisors is an integer number (185534955).

Almost surely, 2^1401334021 is an apocalyptic number.

It is an amenable number.

1401334021 is a deficient number, since it is larger than the sum of its proper divisors (82945619).

1401334021 is a wasteful number, since it uses less digits than its factorization.

1401334021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28583.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1401334021 is about 37434.3962286024. The cubic root of 1401334021 is about 1119.0441517919.

Adding to 1401334021 its reverse (1204331041), we get a palindrome (2605665062).

It can be divided in two parts, 140 and 1334021, that added together give a triangular number (1334161 = T₁₆₃₃).

The spelling of 1401334021 in words is "one billion, four hundred one million, three hundred thirty-four thousand, twenty-one".