245617421 has 8 divisors (see below), whose sum is σ = 282387840. Its totient is φ = 209267568.

The previous prime is 245617417. The next prime is 245617451. The reversal of 245617421 is 124716542.

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

It is a cyclic number.

It is not a de Polignac number, because 245617421 - 2² = 245617417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245617451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103886 + ... + 106223.

It is an arithmetic number, because the mean of its divisors is an integer number (35298480).

Almost surely, 2^245617421 is an apocalyptic number.

It is an amenable number.

245617421 is a deficient number, since it is larger than the sum of its proper divisors (36770419).

245617421 is a wasteful number, since it uses less digits than its factorization.

245617421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210283.

The product of its digits is 13440, while the sum is 32.

The square root of 245617421 is about 15672.1862227323. The cubic root of 245617421 is about 626.2576667946.

The spelling of 245617421 in words is "two hundred forty-five million, six hundred seventeen thousand, four hundred twenty-one".