1401354221 has 2 divisors, whose sum is σ = 1401354222. Its totient is φ = 1401354220.

The previous prime is 1401354191. The next prime is 1401354223. The reversal of 1401354221 is 1224531041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 782041225 + 619312996 = 27965^2 + 24886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401354221 is a prime.

Together with 1401354223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401354223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700677110 + 700677111.

It is an arithmetic number, because the mean of its divisors is an integer number (700677111).

Almost surely, 2^1401354221 is an apocalyptic number.

It is an amenable number.

1401354221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401354221 is an equidigital number, since it uses as much as digits as its factorization.

1401354221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1401354221 is about 37434.6660329700. Note that the first 3 decimals coincide. The cubic root of 1401354221 is about 1119.0495287121.

Adding to 1401354221 its reverse (1224531041), we get a palindrome (2625885262).

The spelling of 1401354221 in words is "one billion, four hundred one million, three hundred fifty-four thousand, two hundred twenty-one".