240621305 has 4 divisors (see below), whose sum is σ = 288745572. Its totient is φ = 192497040.

The previous prime is 240621299. The next prime is 240621347. The reversal of 240621305 is 503126042.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26759929 + 213861376 = 5173^2 + 14624^2 .

It is not a de Polignac number, because 240621305 - 2¹⁴ = 240604921 is a prime.

It is a super-2 number, since 2×240621305² = 115797224839806050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24062126 + ... + 24062135.

It is an arithmetic number, because the mean of its divisors is an integer number (72186393).

Almost surely, 2^240621305 is an apocalyptic number.

It is an amenable number.

240621305 is a deficient number, since it is larger than the sum of its proper divisors (48124267).

240621305 is an equidigital number, since it uses as much as digits as its factorization.

240621305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48124266.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 240621305 is about 15511.9729563973. The cubic root of 240621305 is about 621.9822999619.

Adding to 240621305 its reverse (503126042), we get a palindrome (743747347).

The spelling of 240621305 in words is "two hundred forty million, six hundred twenty-one thousand, three hundred five".