125535019 has 4 divisors (see below), whose sum is σ = 127408744. Its totient is φ = 123661296.

The previous prime is 125535001. The next prime is 125535023. The reversal of 125535019 is 910535521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125535019 - 2⁷ = 125534891 is a prime.

It is a super-2 number, since 2×125535019² = 31518081990660722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125535719) 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, 936762 + ... + 936895.

It is an arithmetic number, because the mean of its divisors is an integer number (31852186).

Almost surely, 2^125535019 is an apocalyptic number.

125535019 is a deficient number, since it is larger than the sum of its proper divisors (1873725).

125535019 is an equidigital number, since it uses as much as digits as its factorization.

125535019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873724.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 125535019 is about 11204.2411166486. The cubic root of 125535019 is about 500.7123433187.

The spelling of 125535019 in words is "one hundred twenty-five million, five hundred thirty-five thousand, nineteen".