1406221273 has 2 divisors, whose sum is σ = 1406221274. Its totient is φ = 1406221272.

The previous prime is 1406221261. The next prime is 1406221277. The reversal of 1406221273 is 3721226041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739187344 + 667033929 = 27188^2 + 25827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406221273 - 2⁵ = 1406221241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1406221277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703110636 + 703110637.

It is an arithmetic number, because the mean of its divisors is an integer number (703110637).

Almost surely, 2^1406221273 is an apocalyptic number.

It is an amenable number.

1406221273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406221273 is an equidigital number, since it uses as much as digits as its factorization.

1406221273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1406221273 is about 37499.6169713772. The cubic root of 1406221273 is about 1120.3435577095.

The spelling of 1406221273 in words is "one billion, four hundred six million, two hundred twenty-one thousand, two hundred seventy-three".