1200421087 has 2 divisors, whose sum is σ = 1200421088. Its totient is φ = 1200421086.

The previous prime is 1200421073. The next prime is 1200421109. The reversal of 1200421087 is 7801240021.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7801240021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200421087 - 2⁷ = 1200420959 is a prime.

It is a super-2 number, since 2×1200421087² = 2882021572228523138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200421787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600210543 + 600210544.

It is an arithmetic number, because the mean of its divisors is an integer number (600210544).

Almost surely, 2^1200421087 is an apocalyptic number.

1200421087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200421087 is an equidigital number, since it uses as much as digits as its factorization.

1200421087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 1200421087 is about 34647.0934856014. The cubic root of 1200421087 is about 1062.7828523434.

The spelling of 1200421087 in words is "one billion, two hundred million, four hundred twenty-one thousand, eighty-seven".