1401451021 has 8 divisors (see below), whose sum is σ = 1408181984. Its totient is φ = 1394735760.

The previous prime is 1401450997. The next prime is 1401451033. The reversal of 1401451021 is 1201541041.

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 1401451021 - 2⁹ = 1401450509 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 1401451021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401451421) 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, 199450 + ... + 206356.

It is an arithmetic number, because the mean of its divisors is an integer number (176022748).

Almost surely, 2^1401451021 is an apocalyptic number.

It is an amenable number.

1401451021 is a deficient number, since it is larger than the sum of its proper divisors (6730963).

1401451021 is an equidigital number, since it uses as much as digits as its factorization.

1401451021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7851.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1401451021 is about 37435.9589298845. The cubic root of 1401451021 is about 1119.0752946221.

Adding to 1401451021 its reverse (1201541041), we get a palindrome (2602992062).

The spelling of 1401451021 in words is "one billion, four hundred one million, four hundred fifty-one thousand, twenty-one".