125400431 has 4 divisors (see below), whose sum is σ = 135046632. Its totient is φ = 115754232.

The previous prime is 125400421. The next prime is 125400433. The reversal of 125400431 is 134004521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134004521 = 7 ⋅19143503.

It is a cyclic number.

It is not a de Polignac number, because 125400431 - 2¹⁴ = 125384047 is a prime.

It is a super-2 number, since 2×125400431² = 31450536189971522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125400433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4823081 + ... + 4823106.

It is an arithmetic number, because the mean of its divisors is an integer number (33761658).

Almost surely, 2^125400431 is an apocalyptic number.

125400431 is a deficient number, since it is larger than the sum of its proper divisors (9646201).

125400431 is an equidigital number, since it uses as much as digits as its factorization.

125400431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9646200.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 125400431 is about 11198.2333874589. The cubic root of 125400431 is about 500.5333388970.

Adding to 125400431 its reverse (134004521), we get a palindrome (259404952).

The spelling of 125400431 in words is "one hundred twenty-five million, four hundred thousand, four hundred thirty-one".