1487585261 has 2 divisors, whose sum is σ = 1487585262. Its totient is φ = 1487585260.

The previous prime is 1487585257. The next prime is 1487585293. The reversal of 1487585261 is 1625857841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1247149225 + 240436036 = 35315^2 + 15506^2 .

It is a cyclic number.

It is not a de Polignac number, because 1487585261 - 2² = 1487585257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1487575261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743792630 + 743792631.

It is an arithmetic number, because the mean of its divisors is an integer number (743792631).

Almost surely, 2^1487585261 is an apocalyptic number.

It is an amenable number.

1487585261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487585261 is an equidigital number, since it uses as much as digits as its factorization.

1487585261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 537600, while the sum is 47.

The square root of 1487585261 is about 38569.2268654688. The cubic root of 1487585261 is about 1141.5474166693.

The spelling of 1487585261 in words is "one billion, four hundred eighty-seven million, five hundred eighty-five thousand, two hundred sixty-one".