1487122581 has 16 divisors (see below), whose sum is σ = 2344233600. Its totient is φ = 820481088.

The previous prime is 1487122579. The next prime is 1487122613. The reversal of 1487122581 is 1852217841.

It is not a de Polignac number, because 1487122581 - 2¹ = 1487122579 is a prime.

It is a super-2 number, since 2×1487122581² = 4423067141840203122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1487122181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1220346 + ... + 1221563.

It is an arithmetic number, because the mean of its divisors is an integer number (146514600).

Almost surely, 2^1487122581 is an apocalyptic number.

It is an amenable number.

1487122581 is a deficient number, since it is larger than the sum of its proper divisors (857111019).

1487122581 is a wasteful number, since it uses less digits than its factorization.

1487122581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441948.

The product of its digits is 35840, while the sum is 39.

The square root of 1487122581 is about 38563.2283529271. The cubic root of 1487122581 is about 1141.4290534981.

The spelling of 1487122581 in words is "one billion, four hundred eighty-seven million, one hundred twenty-two thousand, five hundred eighty-one".