2145205142987 has 2 divisors, whose sum is σ = 2145205142988. Its totient is φ = 2145205142986.

The previous prime is 2145205142947. The next prime is 2145205143007. The reversal of 2145205142987 is 7892415025412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145205142987 - 2¹⁶ = 2145205077451 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145205142947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072602571493 + 1072602571494.

It is an arithmetic number, because the mean of its divisors is an integer number (1072602571494).

Almost surely, 2^{2145205142987} is an apocalyptic number.

2145205142987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145205142987 is an equidigital number, since it uses as much as digits as its factorization.

2145205142987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 2145205142987 in words is "two trillion, one hundred forty-five billion, two hundred five million, one hundred forty-two thousand, nine hundred eighty-seven".