1451520481 has 2 divisors, whose sum is σ = 1451520482. Its totient is φ = 1451520480.

The previous prime is 1451520461. The next prime is 1451520509. The reversal of 1451520481 is 1840251541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1016589456 + 434931025 = 31884^2 + 20855^2 .

It is a cyclic number.

It is not a de Polignac number, because 1451520481 - 2⁵ = 1451520449 is a prime.

It is a super-3 number, since 3×1451520481³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1451520431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725760240 + 725760241.

It is an arithmetic number, because the mean of its divisors is an integer number (725760241).

Almost surely, 2^1451520481 is an apocalyptic number.

It is an amenable number.

1451520481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1451520481 is an equidigital number, since it uses as much as digits as its factorization.

1451520481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 1451520481 is about 38098.8251918612. The cubic root of 1451520481 is about 1132.2466803427.

The spelling of 1451520481 in words is "one billion, four hundred fifty-one million, five hundred twenty thousand, four hundred eighty-one".