125356949 has 2 divisors, whose sum is σ = 125356950. Its totient is φ = 125356948.

The previous prime is 125356939. The next prime is 125356951. The reversal of 125356949 is 949653521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92294449 + 33062500 = 9607^2 + 5750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125356949 is a prime.

It is a Sophie Germain prime.

Together with 125356951, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125356909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62678474 + 62678475.

It is an arithmetic number, because the mean of its divisors is an integer number (62678475).

Almost surely, 2^125356949 is an apocalyptic number.

It is an amenable number.

125356949 is a deficient number, since it is larger than the sum of its proper divisors (1).

125356949 is an equidigital number, since it uses as much as digits as its factorization.

125356949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 44.

The square root of 125356949 is about 11196.2917521830. The cubic root of 125356949 is about 500.4754796948.

The spelling of 125356949 in words is "one hundred twenty-five million, three hundred fifty-six thousand, nine hundred forty-nine".