125821347 has 8 divisors (see below), whose sum is σ = 169647120. Its totient is φ = 82938240.

The previous prime is 125821331. The next prime is 125821357. The reversal of 125821347 is 743128521.

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

It is not a de Polignac number, because 125821347 - 2⁴ = 125821331 is a prime.

It is a super-2 number, since 2×125821347² = 31662022721788818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125821357) 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, 235354 + ... + 235887.

It is an arithmetic number, because the mean of its divisors is an integer number (21205890).

Almost surely, 2^125821347 is an apocalyptic number.

125821347 is a deficient number, since it is larger than the sum of its proper divisors (43825773).

125821347 is an equidigital number, since it uses as much as digits as its factorization.

125821347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471333.

The product of its digits is 13440, while the sum is 33.

The square root of 125821347 is about 11217.0115003953. The cubic root of 125821347 is about 501.0927394346.

Adding to 125821347 its reverse (743128521), we get a palindrome (868949868).

It can be divided in two parts, 12 and 5821347, that multiplied together give a square (69856164 = 8358²).

The spelling of 125821347 in words is "one hundred twenty-five million, eight hundred twenty-one thousand, three hundred forty-seven".