1045239999 has 16 divisors (see below), whose sum is σ = 1431518592. Its totient is φ = 678145248.

The previous prime is 1045239997. The next prime is 1045240013. The reversal of 1045239999 is 9999325401.

It is a happy number.

It is not a de Polignac number, because 1045239999 - 2¹ = 1045239997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045239997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14644 + ... + 48009.

It is an arithmetic number, because the mean of its divisors is an integer number (89469912).

Almost surely, 2^1045239999 is an apocalyptic number.

1045239999 is a deficient number, since it is larger than the sum of its proper divisors (386278593).

1045239999 is an equidigital number, since it uses as much as digits as its factorization.

1045239999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62806.

The product of its (nonzero) digits is 787320, while the sum is 51.

The square root of 1045239999 is about 32330.1716512610. The cubic root of 1045239999 is about 1014.8581419030.

The spelling of 1045239999 in words is "one billion, forty-five million, two hundred thirty-nine thousand, nine hundred ninety-nine".