245149145 has 4 divisors (see below), whose sum is σ = 294178980. Its totient is φ = 196119312.

The previous prime is 245149141. The next prime is 245149169. The reversal of 245149145 is 541941542.

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 85303696 + 159845449 = 9236^2 + 12643^2 .

It is a cyclic number.

It is not a de Polignac number, because 245149145 - 2² = 245149141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245149141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24514910 + ... + 24514919.

It is an arithmetic number, because the mean of its divisors is an integer number (73544745).

Almost surely, 2^245149145 is an apocalyptic number.

It is an amenable number.

245149145 is a deficient number, since it is larger than the sum of its proper divisors (49029835).

245149145 is an equidigital number, since it uses as much as digits as its factorization.

245149145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49029834.

The product of its digits is 28800, while the sum is 35.

The square root of 245149145 is about 15657.2393799162. The cubic root of 245149145 is about 625.8594214234.

The spelling of 245149145 in words is "two hundred forty-five million, one hundred forty-nine thousand, one hundred forty-five".