1201247987 has 2 divisors, whose sum is σ = 1201247988. Its totient is φ = 1201247986.

The previous prime is 1201247981. The next prime is 1201248007. The reversal of 1201247987 is 7897421021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201247987 - 2⁸ = 1201247731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201247981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600623993 + 600623994.

It is an arithmetic number, because the mean of its divisors is an integer number (600623994).

Almost surely, 2^1201247987 is an apocalyptic number.

1201247987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201247987 is an equidigital number, since it uses as much as digits as its factorization.

1201247987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 1201247987 is about 34659.0246112034. The cubic root of 1201247987 is about 1063.0268260177.

The spelling of 1201247987 in words is "one billion, two hundred one million, two hundred forty-seven thousand, nine hundred eighty-seven".