245745121 has 4 divisors (see below), whose sum is σ = 246276352. Its totient is φ = 245213892.

The previous prime is 245745113. The next prime is 245745131. The reversal of 245745121 is 121547542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245745121 - 2³ = 245745113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245745131) 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, 264921 + ... + 265846.

It is an arithmetic number, because the mean of its divisors is an integer number (61569088).

Almost surely, 2^245745121 is an apocalyptic number.

It is an amenable number.

245745121 is a deficient number, since it is larger than the sum of its proper divisors (531231).

245745121 is an equidigital number, since it uses as much as digits as its factorization.

245745121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531230.

The product of its digits is 11200, while the sum is 31.

The square root of 245745121 is about 15676.2597898861. The cubic root of 245745121 is about 626.3661814214.

The spelling of 245745121 in words is "two hundred forty-five million, seven hundred forty-five thousand, one hundred twenty-one".