1021071487 has 2 divisors, whose sum is σ = 1021071488. Its totient is φ = 1021071486.

The previous prime is 1021071347. The next prime is 1021071511. The reversal of 1021071487 is 7841701201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021071487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021074487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510535743 + 510535744.

It is an arithmetic number, because the mean of its divisors is an integer number (510535744).

Almost surely, 2^1021071487 is an apocalyptic number.

1021071487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021071487 is an equidigital number, since it uses as much as digits as its factorization.

1021071487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 1021071487 is about 31954.2092219476. The cubic root of 1021071487 is about 1006.9750643613.

Adding to 1021071487 its reverse (7841701201), we get a palindrome (8862772688).

The spelling of 1021071487 in words is "one billion, twenty-one million, seventy-one thousand, four hundred eighty-seven".