245671439 has 4 divisors (see below), whose sum is σ = 264569256. Its totient is φ = 226773624.

The previous prime is 245671381. The next prime is 245671477. The reversal of 245671439 is 934176542.

245671439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 245671439 - 2¹⁶ = 245605903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245671396 and 245671405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245671639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9448889 + ... + 9448914.

It is an arithmetic number, because the mean of its divisors is an integer number (66142314).

Almost surely, 2^245671439 is an apocalyptic number.

245671439 is a deficient number, since it is larger than the sum of its proper divisors (18897817).

245671439 is a wasteful number, since it uses less digits than its factorization.

245671439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18897816.

The product of its digits is 181440, while the sum is 41.

The square root of 245671439 is about 15673.9094995473. The cubic root of 245671439 is about 626.3035738355.

The spelling of 245671439 in words is "two hundred forty-five million, six hundred seventy-one thousand, four hundred thirty-nine".