240247247 has 4 divisors (see below), whose sum is σ = 254379456. Its totient is φ = 226115040.

The previous prime is 240247243. The next prime is 240247261. The reversal of 240247247 is 742742042.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 240247247 - 2² = 240247243 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 (240247243) 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, 7066079 + ... + 7066112.

It is an arithmetic number, because the mean of its divisors is an integer number (63594864).

Almost surely, 2^240247247 is an apocalyptic number.

240247247 is a deficient number, since it is larger than the sum of its proper divisors (14132209).

240247247 is a wasteful number, since it uses less digits than its factorization.

240247247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14132208.

The product of its (nonzero) digits is 25088, while the sum is 32.

The square root of 240247247 is about 15499.9111932940. The cubic root of 240247247 is about 621.6598318155.

Adding to 240247247 its reverse (742742042), we get a palindrome (982989289).

The spelling of 240247247 in words is "two hundred forty million, two hundred forty-seven thousand, two hundred forty-seven".