1243451087 has 2 divisors, whose sum is σ = 1243451088. Its totient is φ = 1243451086.

The previous prime is 1243451021. The next prime is 1243451107. The reversal of 1243451087 is 7801543421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1243451087 - 2¹⁶ = 1243385551 is a prime.

It is a super-2 number, since 2×1243451087² = 3092341211522963138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243451987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621725543 + 621725544.

It is an arithmetic number, because the mean of its divisors is an integer number (621725544).

Almost surely, 2^1243451087 is an apocalyptic number.

1243451087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243451087 is an equidigital number, since it uses as much as digits as its factorization.

1243451087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 1243451087 is about 35262.6018183571. The cubic root of 1243451087 is about 1075.3328227083.

The spelling of 1243451087 in words is "one billion, two hundred forty-three million, four hundred fifty-one thousand, eighty-seven".