1406616121 has 2 divisors, whose sum is σ = 1406616122. Its totient is φ = 1406616120.

The previous prime is 1406616073. The next prime is 1406616149. The reversal of 1406616121 is 1216166041.

It is an a-pointer prime, because the next prime (1406616149) can be obtained adding 1406616121 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 711555625 + 695060496 = 26675^2 + 26364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406616121 - 2⁷ = 1406615993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1406616121.

It is not a weakly prime, because it can be changed into another prime (1406616181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703308060 + 703308061.

It is an arithmetic number, because the mean of its divisors is an integer number (703308061).

Almost surely, 2^1406616121 is an apocalyptic number.

It is an amenable number.

1406616121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406616121 is an equidigital number, since it uses as much as digits as its factorization.

1406616121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1406616121 is about 37504.8812956394. The cubic root of 1406616121 is about 1120.4484070255.

The spelling of 1406616121 in words is "one billion, four hundred six million, six hundred sixteen thousand, one hundred twenty-one".