1021142987 has 2 divisors, whose sum is σ = 1021142988. Its totient is φ = 1021142986.

The previous prime is 1021142981. The next prime is 1021143001. The reversal of 1021142987 is 7892411201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021142987 - 2⁶ = 1021142923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021142981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510571493 + 510571494.

It is an arithmetic number, because the mean of its divisors is an integer number (510571494).

Almost surely, 2^1021142987 is an apocalyptic number.

1021142987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021142987 is an equidigital number, since it uses as much as digits as its factorization.

1021142987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 1021142987 is about 31955.3279908062. The cubic root of 1021142987 is about 1006.9985681145.

The spelling of 1021142987 in words is "one billion, twenty-one million, one hundred forty-two thousand, nine hundred eighty-seven".