245164521 has 48 divisors (see below), whose sum is σ = 404530560. Its totient is φ = 129212160.

The previous prime is 245164453. The next prime is 245164541. The reversal of 245164521 is 125461542.

It is not a de Polignac number, because 245164521 - 2⁷ = 245164393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245164541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 321781 + ... + 322541.

It is an arithmetic number, because the mean of its divisors is an integer number (8427720).

Almost surely, 2^245164521 is an apocalyptic number.

245164521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

245164521 is a deficient number, since it is larger than the sum of its proper divisors (159366039).

245164521 is a wasteful number, since it uses less digits than its factorization.

245164521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 823 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 245164521 is about 15657.7303910880. The cubic root of 245164521 is about 625.8725059931.

The spelling of 245164521 in words is "two hundred forty-five million, one hundred sixty-four thousand, five hundred twenty-one".