125540069 has 2 divisors, whose sum is σ = 125540070. Its totient is φ = 125540068.

The previous prime is 125540059. The next prime is 125540081. The reversal of 125540069 is 960045521.

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., 110040100 + 15499969 = 10490^2 + 3937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125540069 is a prime.

It is a super-2 number, since 2×125540069² = 31520617849049522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125540059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62770034 + 62770035.

It is an arithmetic number, because the mean of its divisors is an integer number (62770035).

Almost surely, 2^125540069 is an apocalyptic number.

It is an amenable number.

125540069 is a deficient number, since it is larger than the sum of its proper divisors (1).

125540069 is an equidigital number, since it uses as much as digits as its factorization.

125540069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 125540069 is about 11204.4664754731. The cubic root of 125540069 is about 500.7190574171.

The spelling of 125540069 in words is "one hundred twenty-five million, five hundred forty thousand, sixty-nine".