1042777987 has 2 divisors, whose sum is σ = 1042777988. Its totient is φ = 1042777986.

The previous prime is 1042777973. The next prime is 1042778029. The reversal of 1042777987 is 7897772401.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1042777987 - 2¹⁵ = 1042745219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1042777927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521388993 + 521388994.

It is an arithmetic number, because the mean of its divisors is an integer number (521388994).

Almost surely, 2^1042777987 is an apocalyptic number.

1042777987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042777987 is an equidigital number, since it uses as much as digits as its factorization.

1042777987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1382976, while the sum is 52.

The square root of 1042777987 is about 32292.0731294849. The cubic root of 1042777987 is about 1014.0606991248.

The spelling of 1042777987 in words is "one billion, forty-two million, seven hundred seventy-seven thousand, nine hundred eighty-seven".