1481494621 has 2 divisors, whose sum is σ = 1481494622. Its totient is φ = 1481494620.

The previous prime is 1481494603. The next prime is 1481494627. The reversal of 1481494621 is 1264941841.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1437471396 + 44023225 = 37914^2 + 6635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1481494621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1481494627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 740747310 + 740747311.

It is an arithmetic number, because the mean of its divisors is an integer number (740747311).

Almost surely, 2^1481494621 is an apocalyptic number.

It is an amenable number.

1481494621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1481494621 is an equidigital number, since it uses as much as digits as its factorization.

1481494621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 1481494621 is about 38490.1886329490. The cubic root of 1481494621 is about 1139.9873346803.

The spelling of 1481494621 in words is "one billion, four hundred eighty-one million, four hundred ninety-four thousand, six hundred twenty-one".