1240007287 has 2 divisors, whose sum is σ = 1240007288. Its totient is φ = 1240007286.

The previous prime is 1240007281. The next prime is 1240007359. The reversal of 1240007287 is 7827000421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240007287 - 2²³ = 1231618679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240007281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620003643 + 620003644.

It is an arithmetic number, because the mean of its divisors is an integer number (620003644).

Almost surely, 2^1240007287 is an apocalyptic number.

1240007287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240007287 is an equidigital number, since it uses as much as digits as its factorization.

1240007287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 1240007287 is about 35213.7371916132. The cubic root of 1240007287 is about 1074.3391754725.

The spelling of 1240007287 in words is "one billion, two hundred forty million, seven thousand, two hundred eighty-seven".