1005245240 has 16 divisors (see below), whose sum is σ = 2261801880. Its totient is φ = 402098080.

The previous prime is 1005245237. The next prime is 1005245243. The reversal of 1005245240 is 425425001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1005245237) and next prime (1005245243).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005245243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12565526 + ... + 12565605.

Almost surely, 2^1005245240 is an apocalyptic number.

1005245240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005245240 is an abundant number, since it is smaller than the sum of its proper divisors (1256556640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1005245240 is a wasteful number, since it uses less digits than its factorization.

1005245240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25131142 (or 25131138 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 1005245240 is about 31705.6026594670. The cubic root of 1005245240 is about 1001.7453652611.

The spelling of 1005245240 in words is "one billion, five million, two hundred forty-five thousand, two hundred forty".