125219007509 has 2 divisors, whose sum is σ = 125219007510. Its totient is φ = 125219007508.

The previous prime is 125219007469. The next prime is 125219007521. The reversal of 125219007509 is 905700912521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124937506225 + 281501284 = 353465^2 + 16778^2 .

It is a cyclic number.

It is not a de Polignac number, because 125219007509 - 2³² = 120924040213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125219007409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62609503754 + 62609503755.

It is an arithmetic number, because the mean of its divisors is an integer number (62609503755).

Almost surely, 2^125219007509 is an apocalyptic number.

It is an amenable number.

125219007509 is a deficient number, since it is larger than the sum of its proper divisors (1).

125219007509 is an equidigital number, since it uses as much as digits as its factorization.

125219007509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 41.

The spelling of 125219007509 in words is "one hundred twenty-five billion, two hundred nineteen million, seven thousand, five hundred nine".