125454649 has 2 divisors, whose sum is σ = 125454650. Its totient is φ = 125454648.

The previous prime is 125454647. The next prime is 125454677. The reversal of 125454649 is 946454521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105267600 + 20187049 = 10260^2 + 4493^2 .

It is a cyclic number.

It is not a de Polignac number, because 125454649 - 2¹ = 125454647 is a prime.

Together with 125454647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (125454647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62727324 + 62727325.

It is an arithmetic number, because the mean of its divisors is an integer number (62727325).

Almost surely, 2^125454649 is an apocalyptic number.

It is an amenable number.

125454649 is a deficient number, since it is larger than the sum of its proper divisors (1).

125454649 is an equidigital number, since it uses as much as digits as its factorization.

125454649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 40.

The square root of 125454649 is about 11200.6539541225. The cubic root of 125454649 is about 500.6054651945.

The spelling of 125454649 in words is "one hundred twenty-five million, four hundred fifty-four thousand, six hundred forty-nine".