245147146 has 4 divisors (see below), whose sum is σ = 367720722. Its totient is φ = 122573572.

The previous prime is 245147143. The next prime is 245147219. The reversal of 245147146 is 641741542.

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

It can be written as a sum of positive squares in only one way, i.e., 245079025 + 68121 = 15655^2 + 261^2 .

It is not an unprimeable number, because it can be changed into a prime (245147143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61286785 + ... + 61286788.

Almost surely, 2^245147146 is an apocalyptic number.

245147146 is a deficient number, since it is larger than the sum of its proper divisors (122573576).

245147146 is a wasteful number, since it uses less digits than its factorization.

245147146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122573575.

The product of its digits is 26880, while the sum is 34.

The square root of 245147146 is about 15657.1755435008. The cubic root of 245147146 is about 625.8577202870.

Adding to 245147146 its reverse (641741542), we get a palindrome (886888688).

The spelling of 245147146 in words is "two hundred forty-five million, one hundred forty-seven thousand, one hundred forty-six".