125420545 has 4 divisors (see below), whose sum is σ = 150504660. Its totient is φ = 100336432.

The previous prime is 125420521. The next prime is 125420567. The reversal of 125420545 is 545024521.

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 24960016 + 100460529 = 4996^2 + 10023^2 .

It is a cyclic number.

It is not a de Polignac number, because 125420545 - 2¹⁹ = 124896257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12542050 + ... + 12542059.

It is an arithmetic number, because the mean of its divisors is an integer number (37626165).

Almost surely, 2^125420545 is an apocalyptic number.

It is an amenable number.

125420545 is a deficient number, since it is larger than the sum of its proper divisors (25084115).

125420545 is an equidigital number, since it uses as much as digits as its factorization.

125420545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25084114.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 125420545 is about 11199.1314395358. The cubic root of 125420545 is about 500.5600990106.

The spelling of 125420545 in words is "one hundred twenty-five million, four hundred twenty thousand, five hundred forty-five".