125305501 has 4 divisors (see below), whose sum is σ = 125334972. Its totient is φ = 125276032.

The previous prime is 125305493. The next prime is 125305519. The reversal of 125305501 is 105503521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105503521 = 9689 ⋅10889.

It can be written as a sum of positive squares in 2 ways, for example, as 82337476 + 42968025 = 9074^2 + 6555^2 .

It is a cyclic number.

It is not a de Polignac number, because 125305501 - 2³ = 125305493 is a prime.

It is a super-2 number, since 2×125305501² = 31402937161722002, 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 (125305591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7006 + ... + 17311.

It is an arithmetic number, because the mean of its divisors is an integer number (31333743).

Almost surely, 2^125305501 is an apocalyptic number.

It is an amenable number.

125305501 is a deficient number, since it is larger than the sum of its proper divisors (29471).

125305501 is an equidigital number, since it uses as much as digits as its factorization.

125305501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29470.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 125305501 is about 11193.9939699823. The cubic root of 125305501 is about 500.4070032734.

The spelling of 125305501 in words is "one hundred twenty-five million, three hundred five thousand, five hundred one".