125806530 has 16 divisors (see below), whose sum is σ = 301935744. Its totient is φ = 33548400.

The previous prime is 125806529. The next prime is 125806547. The reversal of 125806530 is 35608521.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 4193551 = 125806530 / (1 + 2 + 5 + 8 + 0 + 6 + 5 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2096746 + ... + 2096805.

It is an arithmetic number, because the mean of its divisors is an integer number (18870984).

Almost surely, 2^125806530 is an apocalyptic number.

125806530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125806530 is an abundant number, since it is smaller than the sum of its proper divisors (176129214).

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

125806530 is a wasteful number, since it uses less digits than its factorization.

125806530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193561.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 125806530 is about 11216.3510109126. The cubic root of 125806530 is about 501.0730687328.

It can be divided in two parts, 12580 and 6530, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 125806530 in words is "one hundred twenty-five million, eight hundred six thousand, five hundred thirty".