125420431 has 4 divisors (see below), whose sum is σ = 125442864. Its totient is φ = 125398000.

The previous prime is 125420429. The next prime is 125420461. The reversal of 125420431 is 134024521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 125420431 - 2¹ = 125420429 is a prime.

It is a super-2 number, since 2×125420431² = 31460569024451522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125420401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4686 + ... + 16516.

It is an arithmetic number, because the mean of its divisors is an integer number (31360716).

Almost surely, 2^125420431 is an apocalyptic number.

125420431 is a deficient number, since it is larger than the sum of its proper divisors (22433).

125420431 is a wasteful number, since it uses less digits than its factorization.

125420431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22432.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 125420431 is about 11199.1263498543. The cubic root of 125420431 is about 500.5599473505.

Adding to 125420431 its reverse (134024521), we get a palindrome (259444952).

The spelling of 125420431 in words is "one hundred twenty-five million, four hundred twenty thousand, four hundred thirty-one".