245421321 has 8 divisors (see below), whose sum is σ = 331370880. Its totient is φ = 161542992.

The previous prime is 245421317. The next prime is 245421331. The reversal of 245421321 is 123124542.

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

It is not a de Polignac number, because 245421321 - 2² = 245421317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245421291 and 245421300.

It is not an unprimeable number, because it can be changed into a prime (245421311) 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, 517530 + ... + 518003.

It is an arithmetic number, because the mean of its divisors is an integer number (41421360).

Almost surely, 2^245421321 is an apocalyptic number.

It is an amenable number.

245421321 is a deficient number, since it is larger than the sum of its proper divisors (85949559).

245421321 is a wasteful number, since it uses less digits than its factorization.

245421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035615.

The product of its digits is 1920, while the sum is 24.

The square root of 245421321 is about 15665.9286670149. The cubic root of 245421321 is about 626.0909551855.

Adding to 245421321 its reverse (123124542), we get a palindrome (368545863).

The spelling of 245421321 in words is "two hundred forty-five million, four hundred twenty-one thousand, three hundred twenty-one".