125569069 has 2 divisors, whose sum is σ = 125569070. Its totient is φ = 125569068.

The previous prime is 125569061. The next prime is 125569097. The reversal of 125569069 is 960965521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119639844 + 5929225 = 10938^2 + 2435^2 .

It is an emirp because it is prime and its reverse (960965521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125569069 - 2³ = 125569061 is a prime.

It is a super-2 number, since 2×125569069² = 31535182179053522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125569061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62784534 + 62784535.

It is an arithmetic number, because the mean of its divisors is an integer number (62784535).

Almost surely, 2^125569069 is an apocalyptic number.

It is an amenable number.

125569069 is a deficient number, since it is larger than the sum of its proper divisors (1).

125569069 is an equidigital number, since it uses as much as digits as its factorization.

125569069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 125569069 is about 11205.7605275144. The cubic root of 125569069 is about 500.7576101406.

The spelling of 125569069 in words is "one hundred twenty-five million, five hundred sixty-nine thousand, sixty-nine".