1481319021 has 128 divisors (see below), whose sum is σ = 2752081920. Its totient is φ = 685780992.

The previous prime is 1481319019. The next prime is 1481319067. The reversal of 1481319021 is 1209131841.

It is not a de Polignac number, because 1481319021 - 2¹ = 1481319019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1481319021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481319121) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9435075 + ... + 9435231.

It is an arithmetic number, because the mean of its divisors is an integer number (21500640).

Almost surely, 2^1481319021 is an apocalyptic number.

It is an amenable number.

1481319021 is a deficient number, since it is larger than the sum of its proper divisors (1270762899).

1481319021 is a wasteful number, since it uses less digits than its factorization.

1481319021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 1481319021 is about 38487.9074645531. The cubic root of 1481319021 is about 1139.9422924005.

The spelling of 1481319021 in words is "one billion, four hundred eighty-one million, three hundred nineteen thousand, twenty-one".