125572549 has 2 divisors, whose sum is σ = 125572550. Its totient is φ = 125572548.

The previous prime is 125572547. The next prime is 125572567. The reversal of 125572549 is 945275521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63840100 + 61732449 = 7990^2 + 7857^2 .

It is a cyclic number.

It is not a de Polignac number, because 125572549 - 2¹ = 125572547 is a prime.

Together with 125572547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125572543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62786274 + 62786275.

It is an arithmetic number, because the mean of its divisors is an integer number (62786275).

Almost surely, 2^125572549 is an apocalyptic number.

It is an amenable number.

125572549 is a deficient number, since it is larger than the sum of its proper divisors (1).

125572549 is an equidigital number, since it uses as much as digits as its factorization.

125572549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 40.

The square root of 125572549 is about 11205.9158037172. The cubic root of 125572549 is about 500.7622360685.

The spelling of 125572549 in words is "one hundred twenty-five million, five hundred seventy-two thousand, five hundred forty-nine".