125221245 has 32 divisors (see below), whose sum is σ = 210760704. Its totient is φ = 63398400.

The previous prime is 125221237. The next prime is 125221247. The reversal of 125221245 is 542122521.

It is not a de Polignac number, because 125221245 - 2³ = 125221237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125221247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22105 + ... + 27185.

It is an arithmetic number, because the mean of its divisors is an integer number (6586272).

Almost surely, 2^125221245 is an apocalyptic number.

125221245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125221245 is a deficient number, since it is larger than the sum of its proper divisors (85539459).

125221245 is a wasteful number, since it uses less digits than its factorization.

125221245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5173.

The product of its digits is 1600, while the sum is 24.

The square root of 125221245 is about 11190.2298903999. The cubic root of 125221245 is about 500.2948194621.

Adding to 125221245 its reverse (542122521), we get a palindrome (667343766).

The spelling of 125221245 in words is "one hundred twenty-five million, two hundred twenty-one thousand, two hundred forty-five".