125820454 has 4 divisors (see below), whose sum is σ = 188730684. Its totient is φ = 62910226.

The previous prime is 125820397. The next prime is 125820467. The reversal of 125820454 is 454028521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 454028521 = 1789 ⋅253789.

It is a super-2 number, since 2×125820454² = 31661573289532232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 31455112 + ... + 31455115.

It is an arithmetic number, because the mean of its divisors is an integer number (47182671).

Almost surely, 2^125820454 is an apocalyptic number.

125820454 is a deficient number, since it is larger than the sum of its proper divisors (62910230).

125820454 is an equidigital number, since it uses as much as digits as its factorization.

125820454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62910229.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 125820454 is about 11216.9716947133. The cubic root of 125820454 is about 501.0915539525.

Adding to 125820454 its reverse (454028521), we get a palindrome (579848975).

It can be divided in two parts, 1258 and 20454, that added together give a palindrome (21712).

The spelling of 125820454 in words is "one hundred twenty-five million, eight hundred twenty thousand, four hundred fifty-four".