1487239261 has 2 divisors, whose sum is σ = 1487239262. Its totient is φ = 1487239260.

The previous prime is 1487239253. The next prime is 1487239297. The reversal of 1487239261 is 1629327841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1359323161 + 127916100 = 36869^2 + 11310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1487239261 - 2³ = 1487239253 is a prime.

It is a super-2 number, since 2×1487239261² = 4423761238919652242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1487239361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743619630 + 743619631.

It is an arithmetic number, because the mean of its divisors is an integer number (743619631).

Almost surely, 2^1487239261 is an apocalyptic number.

It is an amenable number.

1487239261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487239261 is an equidigital number, since it uses as much as digits as its factorization.

1487239261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 1487239261 is about 38564.7411633995. The cubic root of 1487239261 is about 1141.4589049846.

The spelling of 1487239261 in words is "one billion, four hundred eighty-seven million, two hundred thirty-nine thousand, two hundred sixty-one".