125555545 has 8 divisors (see below), whose sum is σ = 151314696. Its totient is φ = 100012416.

The previous prime is 125555531. The next prime is 125555567. The reversal of 125555545 is 545555521.

It can be written as a sum of positive squares in 4 ways, for example, as 1545049 + 124010496 = 1243^2 + 11136^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125555545 - 2¹⁵ = 125522777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52722 + ... + 55051.

It is an arithmetic number, because the mean of its divisors is an integer number (18914337).

Almost surely, 2^125555545 is an apocalyptic number.

It is an amenable number.

125555545 is a deficient number, since it is larger than the sum of its proper divisors (25759151).

125555545 is a wasteful number, since it uses less digits than its factorization.

125555545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108011.

The product of its digits is 125000, while the sum is 37.

The square root of 125555545 is about 11205.1570716345. The cubic root of 125555545 is about 500.7396320161.

The spelling of 125555545 in words is "one hundred twenty-five million, five hundred fifty-five thousand, five hundred forty-five".