245244021 has 8 divisors (see below), whose sum is σ = 356718624. Its totient is φ = 148632720.

The previous prime is 245243993. The next prime is 245244031. The reversal of 245244021 is 120442542.

It is a happy number.

245244021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 245244021 - 2¹¹ = 245241973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245243982 and 245244000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245244031) 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, 3715786 + ... + 3715851.

It is an arithmetic number, because the mean of its divisors is an integer number (44589828).

Almost surely, 2^245244021 is an apocalyptic number.

It is an amenable number.

245244021 is a deficient number, since it is larger than the sum of its proper divisors (111474603).

245244021 is a wasteful number, since it uses less digits than its factorization.

245244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7431651.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 245244021 is about 15660.2688674237. The cubic root of 245244021 is about 625.9401496673.

Adding to 245244021 its reverse (120442542), we get a palindrome (365686563).

The spelling of 245244021 in words is "two hundred forty-five million, two hundred forty-four thousand, twenty-one".