1400241221 has 4 divisors (see below), whose sum is σ = 1400358732. Its totient is φ = 1400123712.

The previous prime is 1400241211. The next prime is 1400241229. The reversal of 1400241221 is 1221420041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1221420041 = 103 ⋅11858447.

It can be written as a sum of positive squares in 2 ways, for example, as 1312612900 + 87628321 = 36230^2 + 9361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400241221 - 2²⁶ = 1333132357 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 1400241221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400241229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38570 + ... + 65483.

It is an arithmetic number, because the mean of its divisors is an integer number (350089683).

Almost surely, 2^1400241221 is an apocalyptic number.

It is an amenable number.

1400241221 is a deficient number, since it is larger than the sum of its proper divisors (117511).

1400241221 is a wasteful number, since it uses less digits than its factorization.

1400241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117510.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1400241221 is about 37419.7971801024. The cubic root of 1400241221 is about 1118.7531886929.

Adding to 1400241221 its reverse (1221420041), we get a palindrome (2621661262).

The spelling of 1400241221 in words is "one billion, four hundred million, two hundred forty-one thousand, two hundred twenty-one".