245725801 has 4 divisors (see below), whose sum is σ = 245931604. Its totient is φ = 245520000.

The previous prime is 245725763. The next prime is 245725847. The reversal of 245725801 is 108527542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 108527542 = 2 ⋅54263771.

It can be written as a sum of positive squares in 2 ways, for example, as 62394201 + 183331600 = 7899^2 + 13540^2 .

It is a cyclic number.

It is not a de Polignac number, because 245725801 - 2⁷ = 245725673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245725891) 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, 101100 + ... + 103501.

It is an arithmetic number, because the mean of its divisors is an integer number (61482901).

Almost surely, 2^245725801 is an apocalyptic number.

It is an amenable number.

245725801 is a deficient number, since it is larger than the sum of its proper divisors (205803).

245725801 is a wasteful number, since it uses less digits than its factorization.

245725801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205802.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 245725801 is about 15675.6435593567. The cubic root of 245725801 is about 626.3497664305.

The spelling of 245725801 in words is "two hundred forty-five million, seven hundred twenty-five thousand, eight hundred one".