245221442 has 8 divisors (see below), whose sum is σ = 371207100. Its totient is φ = 121485744.

The previous prime is 245221441. The next prime is 245221453. The reversal of 245221442 is 244122542.

It can be written as a sum of positive squares in 2 ways, for example, as 245204281 + 17161 = 15659^2 + 131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (245221441) 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 in 3 ways as a sum of consecutive naturals, for example, 562217 + ... + 562652.

Almost surely, 2^245221442 is an apocalyptic number.

245221442 is a deficient number, since it is larger than the sum of its proper divisors (125985658).

245221442 is a wasteful number, since it uses less digits than its factorization.

245221442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124980.

The product of its digits is 5120, while the sum is 26.

The square root of 245221442 is about 15659.5479500527. The cubic root of 245221442 is about 625.9209394995.

Adding to 245221442 its reverse (244122542), we get a palindrome (489343984).

The spelling of 245221442 in words is "two hundred forty-five million, two hundred twenty-one thousand, four hundred forty-two".