4145125261 has 8 divisors (see below), whose sum is σ = 4158718200. Its totient is φ = 4131548160.

The previous prime is 4145125241. The next prime is 4145125277. The reversal of 4145125261 is 1625215414.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1259824036 + 2885301225 = 35494^2 + 53715^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4145125261 - 2¹⁵ = 4145092493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4145125241) 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, 732001 + ... + 737641.

It is an arithmetic number, because the mean of its divisors is an integer number (519839775).

Almost surely, 2^4145125261 is an apocalyptic number.

It is an amenable number.

4145125261 is a deficient number, since it is larger than the sum of its proper divisors (13592939).

4145125261 is a wasteful number, since it uses less digits than its factorization.

4145125261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7919.

The product of its digits is 9600, while the sum is 31.

The square root of 4145125261 is about 64382.6472040409. The cubic root of 4145125261 is about 1606.3711152427.

The spelling of 4145125261 in words is "four billion, one hundred forty-five million, one hundred twenty-five thousand, two hundred sixty-one".