125217540 has 108 divisors (see below), whose sum is σ = 441870156. Its totient is φ = 28619136.

The previous prime is 125217539. The next prime is 125217551. The reversal of 125217540 is 45712521.

It can be written as a sum of positive squares in 2 ways, for example, as 94945536 + 30272004 = 9744^2 + 5502^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1722 + ... + 15918.

Almost surely, 2^125217540 is an apocalyptic number.

125217540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125217540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220935078).

125217540 is an abundant number, since it is smaller than the sum of its proper divisors (316652616).

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

125217540 is a wasteful number, since it uses less digits than its factorization.

125217540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14226 (or 14214 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 125217540 is about 11190.0643429786. The cubic root of 125217540 is about 500.2898852340.

The spelling of 125217540 in words is "one hundred twenty-five million, two hundred seventeen thousand, five hundred forty".