127213225 has 6 divisors (see below), whose sum is σ = 157744430. Its totient is φ = 101770560.

The previous prime is 127213213. The next prime is 127213259. The reversal of 127213225 is 522312721.

It can be written as a sum of positive squares in 3 ways, for example, as 7551504 + 119661721 = 2748^2 + 10939^2 .

It is not a de Polignac number, because 127213225 - 2⁹ = 127212713 is a prime.

It is a super-2 number, since 2×127213225² = 32366409229801250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 5088529 = 127213225 / (1 + 2 + 7 + 2 + 1 + 3 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 127213225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2544240 + ... + 2544289.

Almost surely, 2^127213225 is an apocalyptic number.

It is an amenable number.

127213225 is a deficient number, since it is larger than the sum of its proper divisors (30531205).

127213225 is an equidigital number, since it uses as much as digits as its factorization.

127213225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5088539 (or 5088534 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 127213225 is about 11278.8840316762. The cubic root of 127213225 is about 502.9337195793.

Adding to 127213225 its reverse (522312721), we get a palindrome (649525946).

The spelling of 127213225 in words is "one hundred twenty-seven million, two hundred thirteen thousand, two hundred twenty-five".