153240705 has 24 divisors (see below), whose sum is σ = 266016192. Its totient is φ = 81605664.

The previous prime is 153240683. The next prime is 153240733. The reversal of 153240705 is 507042351.

It is a happy number.

It is not a de Polignac number, because 153240705 - 2⁵ = 153240673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33252 + ... + 37578.

It is an arithmetic number, because the mean of its divisors is an integer number (11084008).

Almost surely, 2^153240705 is an apocalyptic number.

153240705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

153240705 is a deficient number, since it is larger than the sum of its proper divisors (112775487).

153240705 is a wasteful number, since it uses less digits than its factorization.

153240705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125 (or 5122 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 153240705 is about 12379.0429759332. The cubic root of 153240705 is about 535.1284578136.

The spelling of 153240705 in words is "one hundred fifty-three million, two hundred forty thousand, seven hundred five".