1240253515 has 16 divisors (see below), whose sum is σ = 1527372000. Its totient is φ = 966292992.

The previous prime is 1240253507. The next prime is 1240253533. The reversal of 1240253515 is 5153520421.

It is a cyclic number.

It is not a de Polignac number, because 1240253515 - 2³ = 1240253507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66771 + ... + 83299.

It is an arithmetic number, because the mean of its divisors is an integer number (95460750).

Almost surely, 2^1240253515 is an apocalyptic number.

1240253515 is a deficient number, since it is larger than the sum of its proper divisors (287118485).

1240253515 is a wasteful number, since it uses less digits than its factorization.

1240253515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16926.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 1240253515 is about 35217.2332104610. The cubic root of 1240253515 is about 1074.4102812050.

Adding to 1240253515 its reverse (5153520421), we get a palindrome (6393773936).

The spelling of 1240253515 in words is "one billion, two hundred forty million, two hundred fifty-three thousand, five hundred fifteen".