1582241987 has 2 divisors, whose sum is σ = 1582241988. Its totient is φ = 1582241986.

The previous prime is 1582241971. The next prime is 1582241993. The reversal of 1582241987 is 7891422851.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1582241987 - 2⁴ = 1582241971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1582241957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791120993 + 791120994.

It is an arithmetic number, because the mean of its divisors is an integer number (791120994).

Almost surely, 2^1582241987 is an apocalyptic number.

1582241987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1582241987 is an equidigital number, since it uses as much as digits as its factorization.

1582241987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 47.

The square root of 1582241987 is about 39777.4054835154. The cubic root of 1582241987 is about 1165.2639254193.

The spelling of 1582241987 in words is "one billion, five hundred eighty-two million, two hundred forty-one thousand, nine hundred eighty-seven".