245639041 has 4 divisors (see below), whose sum is σ = 252277972. Its totient is φ = 239000112.

The previous prime is 245639039. The next prime is 245639083. The reversal of 245639041 is 140936542.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 110986225 + 134652816 = 10535^2 + 11604^2 .

It is a cyclic number.

It is not a de Polignac number, because 245639041 - 2¹ = 245639039 is a prime.

It is a super-3 number, since 3×245639041³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245638988 and 245639006.

It is not an unprimeable number, because it can be changed into a prime (245634041) 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, 3319410 + ... + 3319483.

It is an arithmetic number, because the mean of its divisors is an integer number (63069493).

Almost surely, 2^245639041 is an apocalyptic number.

It is an amenable number.

245639041 is a deficient number, since it is larger than the sum of its proper divisors (6638931).

245639041 is an equidigital number, since it uses as much as digits as its factorization.

245639041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6638930.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 245639041 is about 15672.8759645446. The cubic root of 245639041 is about 626.2760412968.

The spelling of 245639041 in words is "two hundred forty-five million, six hundred thirty-nine thousand, forty-one".