1487402207281 has 9 divisors (see below), whose sum is σ = 1569831218091. Its totient is φ = 1409095927944.

The previous prime is 1487402207251. The next prime is 1487402207303. The reversal of 1487402207281 is 1827022047841.

The square root of 1487402207281 is 1219591.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1011716117281 + 475686090000 = 1005841^2 + 689700^2 .

It is not a de Polignac number, because 1487402207281 - 2²⁷ = 1487267989553 is a prime.

It is a super-2 number, since 2×1487402207281² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1487402207251) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23140135 + ... + 23204323.

It is an arithmetic number, because the mean of its divisors is an integer number (174425690899).

Almost surely, 2^{1487402207281} is an apocalyptic number.

1487402207281 is the 1219591-st square number.

1487402207281 is the 609796-th centered octagonal number.

It is an amenable number.

1487402207281 is a deficient number, since it is larger than the sum of its proper divisors (82429010810).

1487402207281 is an frugal number, since it uses more digits than its factorization.

1487402207281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128416 (or 64208 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 46.

The spelling of 1487402207281 in words is "one trillion, four hundred eighty-seven billion, four hundred two million, two hundred seven thousand, two hundred eighty-one".