1481629621 has 2 divisors, whose sum is σ = 1481629622. Its totient is φ = 1481629620.

The previous prime is 1481629607. The next prime is 1481629651. The reversal of 1481629621 is 1269261841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1478787025 + 2842596 = 38455^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 1481629621 - 2⁷ = 1481629493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1481629601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 740814810 + 740814811.

It is an arithmetic number, because the mean of its divisors is an integer number (740814811).

Almost surely, 2^1481629621 is an apocalyptic number.

It is an amenable number.

1481629621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1481629621 is an equidigital number, since it uses as much as digits as its factorization.

1481629621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 1481629621 is about 38491.9422866657. The cubic root of 1481629621 is about 1140.0219604367.

The spelling of 1481629621 in words is "one billion, four hundred eighty-one million, six hundred twenty-nine thousand, six hundred twenty-one".