245020402 has 12 divisors (see below), whose sum is σ = 403980318. Its totient is φ = 111372800.

The previous prime is 245020397. The next prime is 245020421. The reversal of 245020402 is 204020542.

It can be written as a sum of positive squares in only one way, i.e., 204175521 + 40844881 = 14289^2 + 6391^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 245020402.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 505999 + ... + 506482.

Almost surely, 2^245020402 is an apocalyptic number.

245020402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

245020402 is a deficient number, since it is larger than the sum of its proper divisors (158959916).

245020402 is a wasteful number, since it uses less digits than its factorization.

245020402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012505 (or 1012494 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 245020402 is about 15653.1275469153. The cubic root of 245020402 is about 625.7498430569.

Adding to 245020402 its reverse (204020542), we get a palindrome (449040944).

It can be divided in two parts, 2450 and 20402, that multiplied together give a square (49984900 = 7070²).

The spelling of 245020402 in words is "two hundred forty-five million, twenty thousand, four hundred two".