1406144521 has 2 divisors, whose sum is σ = 1406144522. Its totient is φ = 1406144520.

The previous prime is 1406144497. The next prime is 1406144527. The reversal of 1406144521 is 1254416041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227521296 + 178623225 = 35036^2 + 13365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1406144521 - 2¹⁵ = 1406111753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1406144521.

It is not a weakly prime, because it can be changed into another prime (1406144527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703072260 + 703072261.

It is an arithmetic number, because the mean of its divisors is an integer number (703072261).

Almost surely, 2^1406144521 is an apocalyptic number.

It is an amenable number.

1406144521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406144521 is an equidigital number, since it uses as much as digits as its factorization.

1406144521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1406144521 is about 37498.5935869600. The cubic root of 1406144521 is about 1120.3231744372.

The spelling of 1406144521 in words is "one billion, four hundred six million, one hundred forty-four thousand, five hundred twenty-one".