245545442 has 4 divisors (see below), whose sum is σ = 368318166. Its totient is φ = 122772720.

The previous prime is 245545439. The next prime is 245545463. The reversal of 245545442 is 244545542.

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., 229855921 + 15689521 = 15161^2 + 3961^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61386359 + ... + 61386362.

Almost surely, 2^245545442 is an apocalyptic number.

245545442 is a deficient number, since it is larger than the sum of its proper divisors (122772724).

245545442 is a wasteful number, since it uses less digits than its factorization.

245545442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122772723.

The product of its digits is 128000, while the sum is 35.

The square root of 245545442 is about 15669.8896613856. The cubic root of 245545442 is about 626.1964851888.

The spelling of 245545442 in words is "two hundred forty-five million, five hundred forty-five thousand, four hundred forty-two".