125205263 has 4 divisors (see below), whose sum is σ = 125351880. Its totient is φ = 125058648.

The previous prime is 125205229. The next prime is 125205277. The reversal of 125205263 is 362502521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362502521 = 7129 ⋅50849.

It is a cyclic number.

It is not a de Polignac number, because 125205263 - 2¹⁰ = 125204239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125208263) 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, 72020 + ... + 73737.

It is an arithmetic number, because the mean of its divisors is an integer number (31337970).

Almost surely, 2^125205263 is an apocalyptic number.

125205263 is a deficient number, since it is larger than the sum of its proper divisors (146617).

125205263 is an equidigital number, since it uses as much as digits as its factorization.

125205263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146616.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 125205263 is about 11189.5157625341. The cubic root of 125205263 is about 500.2735343307.

Adding to 125205263 its reverse (362502521), we get a palindrome (487707784).

The spelling of 125205263 in words is "one hundred twenty-five million, two hundred five thousand, two hundred sixty-three".