1478792521 has 12 divisors (see below), whose sum is σ = 1547827092. Its totient is φ = 1412719616.

The previous prime is 1478792503. The next prime is 1478792543. The reversal of 1478792521 is 1252978741.

It can be written as a sum of positive squares in 2 ways, for example, as 594384400 + 884408121 = 24380^2 + 29739^2 .

It is not a de Polignac number, because 1478792521 - 2⁹ = 1478792009 is a prime.

It is a super-3 number, since 3×1478792521³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1478292521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 642645 + ... + 644941.

It is an arithmetic number, because the mean of its divisors is an integer number (128985591).

Almost surely, 2^1478792521 is an apocalyptic number.

It is an amenable number.

1478792521 is a deficient number, since it is larger than the sum of its proper divisors (69034571).

1478792521 is a wasteful number, since it uses less digits than its factorization.

1478792521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560 (or 3537 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The square root of 1478792521 is about 38455.0714600818. The cubic root of 1478792521 is about 1139.2938380833.

The spelling of 1478792521 in words is "one billion, four hundred seventy-eight million, seven hundred ninety-two thousand, five hundred twenty-one".