245821434 has 32 divisors (see below), whose sum is σ = 495996480. Its totient is φ = 81219072.

The previous prime is 245821427. The next prime is 245821439. The reversal of 245821434 is 434128542.

It is a junction number, because it is equal to n+sod(n) for n = 245821395 and 245821404.

It is not an unprimeable number, because it can be changed into a prime (245821439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586477 + ... + 586895.

It is an arithmetic number, because the mean of its divisors is an integer number (15499890).

Almost surely, 2^245821434 is an apocalyptic number.

245821434 is an abundant number, since it is smaller than the sum of its proper divisors (250175046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245821434 is a wasteful number, since it uses less digits than its factorization.

245821434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054.

The product of its digits is 30720, while the sum is 33.

The square root of 245821434 is about 15678.6936318049. The cubic root of 245821434 is about 626.4310113764.

Adding to 245821434 its reverse (434128542), we get a palindrome (679949976).

The spelling of 245821434 in words is "two hundred forty-five million, eight hundred twenty-one thousand, four hundred thirty-four".