245101021 has 16 divisors (see below), whose sum is σ = 270521280. Its totient is φ = 220222080.

The previous prime is 245101013. The next prime is 245101027. The reversal of 245101021 is 120101542.

It is a cyclic number.

It is not a de Polignac number, because 245101021 - 2³ = 245101013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245100986 and 245101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245101027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599065 + ... + 599473.

It is an arithmetic number, because the mean of its divisors is an integer number (16907580).

Almost surely, 2^245101021 is an apocalyptic number.

It is an amenable number.

245101021 is a deficient number, since it is larger than the sum of its proper divisors (25420259).

245101021 is a wasteful number, since it uses less digits than its factorization.

245101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 245101021 is about 15655.7025073933. The cubic root of 245101021 is about 625.8184656345.

Adding to 245101021 its reverse (120101542), we get a palindrome (365202563).

The spelling of 245101021 in words is "two hundred forty-five million, one hundred one thousand, twenty-one".