245526121 has 4 divisors (see below), whose sum is σ = 259968852. Its totient is φ = 231083392.

The previous prime is 245526101. The next prime is 245526181. The reversal of 245526121 is 121625542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121625542 = 2 ⋅60812771.

It can be written as a sum of positive squares in 2 ways, for example, as 183982096 + 61544025 = 13564^2 + 7845^2 .

It is a cyclic number.

It is not a de Polignac number, because 245526121 - 2⁷ = 245525993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245526121.

It is not an unprimeable number, because it can be changed into a prime (245526101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7221340 + ... + 7221373.

It is an arithmetic number, because the mean of its divisors is an integer number (64992213).

Almost surely, 2^245526121 is an apocalyptic number.

It is an amenable number.

245526121 is a deficient number, since it is larger than the sum of its proper divisors (14442731).

245526121 is a wasteful number, since it uses less digits than its factorization.

245526121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14442730.

The product of its digits is 4800, while the sum is 28.

The square root of 245526121 is about 15669.2731484265. The cubic root of 245526121 is about 626.1800604495.

The spelling of 245526121 in words is "two hundred forty-five million, five hundred twenty-six thousand, one hundred twenty-one".