125820491 has 8 divisors (see below), whose sum is σ = 128128704. Its totient is φ = 123520320.

The previous prime is 125820467. The next prime is 125820493. The reversal of 125820491 is 194028521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125820491 - 2¹⁸ = 125558347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125820493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35966 + ... + 39308.

It is an arithmetic number, because the mean of its divisors is an integer number (16016088).

Almost surely, 2^125820491 is an apocalyptic number.

125820491 is a deficient number, since it is larger than the sum of its proper divisors (2308213).

125820491 is an equidigital number, since it uses as much as digits as its factorization.

125820491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 125820491 is about 11216.9733439997. The cubic root of 125820491 is about 501.0916030711.

The spelling of 125820491 in words is "one hundred twenty-five million, eight hundred twenty thousand, four hundred ninety-one".