1245087999 has 48 divisors (see below), whose sum is σ = 1926805504. Its totient is φ = 773323200.

The previous prime is 1245087997. The next prime is 1245088037. The reversal of 1245087999 is 9997805421.

1245087999 is a `hidden beast` number, since 124 + 508 + 7 + 9 + 9 + 9 = 666.

It is not a de Polignac number, because 1245087999 - 2¹ = 1245087997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245087997) 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 in 47 ways as a sum of consecutive naturals, for example, 1062684 + ... + 1063854.

Almost surely, 2^1245087999 is an apocalyptic number.

1245087999 is a deficient number, since it is larger than the sum of its proper divisors (681717505).

1245087999 is a wasteful number, since it uses less digits than its factorization.

1245087999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348 (or 1345 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The square root of 1245087999 is about 35285.8044969928. The cubic root of 1245087999 is about 1075.8044813530.

The spelling of 1245087999 in words is "one billion, two hundred forty-five million, eighty-seven thousand, nine hundred ninety-nine".