125281801 has 6 divisors (see below), whose sum is σ = 132223002. Its totient is φ = 118687680.

The previous prime is 125281799. The next prime is 125281811. The reversal of 125281801 is 108182521.

125281801 = T₁₉₀ + T₁₉₁ + ... + T₉₁₁.

It can be written as a sum of positive squares in only one way, i.e., 91699776 + 33582025 = 9576^2 + 5795^2 .

It is not a de Polignac number, because 125281801 - 2¹ = 125281799 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 125281801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125281811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173160 + ... + 173881.

It is an arithmetic number, because the mean of its divisors is an integer number (22037167).

Almost surely, 2^125281801 is an apocalyptic number.

It is an amenable number.

125281801 is a deficient number, since it is larger than the sum of its proper divisors (6941201).

125281801 is an equidigital number, since it uses as much as digits as its factorization.

125281801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347079 (or 347060 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 125281801 is about 11192.9353165289. The cubic root of 125281801 is about 500.3754526667.

The spelling of 125281801 in words is "one hundred twenty-five million, two hundred eighty-one thousand, eight hundred one".