125146409 has 4 divisors (see below), whose sum is σ = 127507716. Its totient is φ = 122785104.

The previous prime is 125146363. The next prime is 125146457. The reversal of 125146409 is 904641521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68475625 + 56670784 = 8275^2 + 7528^2 .

It is a cyclic number.

It is not a de Polignac number, because 125146409 - 2¹² = 125142313 is a prime.

It is a super-3 number, since 3×125146409³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125146459) 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, 1180574 + ... + 1180679.

It is an arithmetic number, because the mean of its divisors is an integer number (31876929).

Almost surely, 2^125146409 is an apocalyptic number.

It is an amenable number.

125146409 is a deficient number, since it is larger than the sum of its proper divisors (2361307).

125146409 is an equidigital number, since it uses as much as digits as its factorization.

125146409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361306.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 125146409 is about 11186.8855808934. The cubic root of 125146409 is about 500.1951358341.

The spelling of 125146409 in words is "one hundred twenty-five million, one hundred forty-six thousand, four hundred nine".