125420563 has 4 divisors (see below), whose sum is σ = 129745440. Its totient is φ = 121095688.

The previous prime is 125420521. The next prime is 125420567. The reversal of 125420563 is 365024521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365024521 = 149 ⋅2449829.

It is a cyclic number.

It is not a de Polignac number, because 125420563 - 2⁹ = 125420051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125420567) 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, 2162395 + ... + 2162452.

It is an arithmetic number, because the mean of its divisors is an integer number (32436360).

Almost surely, 2^125420563 is an apocalyptic number.

125420563 is a deficient number, since it is larger than the sum of its proper divisors (4324877).

125420563 is an equidigital number, since it uses as much as digits as its factorization.

125420563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324876.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 125420563 is about 11199.1322431696. The cubic root of 125420563 is about 500.5601229569.

The spelling of 125420563 in words is "one hundred twenty-five million, four hundred twenty thousand, five hundred sixty-three".