125420205 has 32 divisors (see below), whose sum is σ = 207834624. Its totient is φ = 64544256.

The previous prime is 125420201. The next prime is 125420227. The reversal of 125420205 is 502024521.

125420205 = T₁₈₂ + T₁₈₃ + ... + T₉₁₁.

It is a happy number.

It is not a de Polignac number, because 125420205 - 2² = 125420201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125420201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50247 + ... + 52683.

It is an arithmetic number, because the mean of its divisors is an integer number (6494832).

Almost surely, 2^125420205 is an apocalyptic number.

125420205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125420205 is a deficient number, since it is larger than the sum of its proper divisors (82414419).

125420205 is a wasteful number, since it uses less digits than its factorization.

125420205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 125420205 is about 11199.1162597769. The cubic root of 125420205 is about 500.5596466908.

Adding to 125420205 its reverse (502024521), we get a palindrome (627444726).

The spelling of 125420205 in words is "one hundred twenty-five million, four hundred twenty thousand, two hundred five".