125442899 has 2 divisors, whose sum is σ = 125442900. Its totient is φ = 125442898.

The previous prime is 125442803. The next prime is 125442917. The reversal of 125442899 is 998244521.

It is a strong prime.

It is an emirp because it is prime and its reverse (998244521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125442899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125442799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62721449 + 62721450.

It is an arithmetic number, because the mean of its divisors is an integer number (62721450).

Almost surely, 2^125442899 is an apocalyptic number.

125442899 is a deficient number, since it is larger than the sum of its proper divisors (1).

125442899 is an equidigital number, since it uses as much as digits as its factorization.

125442899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 125442899 is about 11200.1294188951. The cubic root of 125442899 is about 500.5898359136.

The spelling of 125442899 in words is "one hundred twenty-five million, four hundred forty-two thousand, eight hundred ninety-nine".