245109621 has 8 divisors (see below), whose sum is σ = 346037184. Its totient is φ = 153794240.

The previous prime is 245109617. The next prime is 245109629. The reversal of 245109621 is 126901542.

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

It is not a de Polignac number, because 245109621 - 2² = 245109617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245109629) 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, 2402985 + ... + 2403086.

It is an arithmetic number, because the mean of its divisors is an integer number (43254648).

Almost surely, 2^245109621 is an apocalyptic number.

It is an amenable number.

245109621 is a deficient number, since it is larger than the sum of its proper divisors (100927563).

245109621 is a wasteful number, since it uses less digits than its factorization.

245109621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806091.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 245109621 is about 15655.9771652874. The cubic root of 245109621 is about 625.8257850327.

The spelling of 245109621 in words is "two hundred forty-five million, one hundred nine thousand, six hundred twenty-one".