125520247 has 2 divisors, whose sum is σ = 125520248. Its totient is φ = 125520246.

The previous prime is 125520211. The next prime is 125520259. The reversal of 125520247 is 742025521.

It is a strong prime.

It is an emirp because it is prime and its reverse (742025521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125520247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125520047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62760123 + 62760124.

It is an arithmetic number, because the mean of its divisors is an integer number (62760124).

Almost surely, 2^125520247 is an apocalyptic number.

125520247 is a deficient number, since it is larger than the sum of its proper divisors (1).

125520247 is an equidigital number, since it uses as much as digits as its factorization.

125520247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 125520247 is about 11203.5818825945. The cubic root of 125520247 is about 500.6927025498.

Adding to 125520247 its reverse (742025521), we get a palindrome (867545768).

The spelling of 125520247 in words is "one hundred twenty-five million, five hundred twenty thousand, two hundred forty-seven".