125840340 has 36 divisors (see below), whose sum is σ = 381716244. Its totient is φ = 33557376.

The previous prime is 125840339. The next prime is 125840347. The reversal of 125840340 is 43048521.

125840340 is a `hidden beast` number, since 1 + 258 + 403 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 89984196 + 35856144 = 9486^2 + 5988^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125840347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349377 + ... + 349736.

It is an arithmetic number, because the mean of its divisors is an integer number (10603229).

Almost surely, 2^125840340 is an apocalyptic number.

125840340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125840340 is an abundant number, since it is smaller than the sum of its proper divisors (255875904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125840340 is a wasteful number, since it uses less digits than its factorization.

125840340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699128 (or 699123 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 125840340 is about 11217.8580843225. The cubic root of 125840340 is about 501.1179518377.

Adding to 125840340 its reverse (43048521), we get a palindrome (168888861).

The spelling of 125840340 in words is "one hundred twenty-five million, eight hundred forty thousand, three hundred forty".