125820769 has 4 divisors (see below), whose sum is σ = 126020800. Its totient is φ = 125620740.

The previous prime is 125820749. The next prime is 125820797. The reversal of 125820769 is 967028521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125820769 - 2¹⁵ = 125788001 is a prime.

It is a super-2 number, since 2×125820769² = 31661731823502722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125820719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99069 + ... + 100330.

It is an arithmetic number, because the mean of its divisors is an integer number (31505200).

Almost surely, 2^125820769 is an apocalyptic number.

It is an amenable number.

125820769 is a deficient number, since it is larger than the sum of its proper divisors (200031).

125820769 is an equidigital number, since it uses as much as digits as its factorization.

125820769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200030.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 125820769 is about 11216.9857359275. The cubic root of 125820769 is about 501.0919721243.

The spelling of 125820769 in words is "one hundred twenty-five million, eight hundred twenty thousand, seven hundred sixty-nine".