125613101 has 4 divisors (see below), whose sum is σ = 125643804. Its totient is φ = 125582400.

The previous prime is 125613083. The next prime is 125613121. The reversal of 125613101 is 101316521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101316521 = 1871 ⋅54151.

It can be written as a sum of positive squares in 2 ways, for example, as 78676900 + 46936201 = 8870^2 + 6851^2 .

It is a cyclic number.

It is not a de Polignac number, because 125613101 - 2¹⁸ = 125350957 is a prime.

It is a super-2 number, since 2×125613101² = 31557302285672402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125613121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8060 + ... + 17781.

It is an arithmetic number, because the mean of its divisors is an integer number (31410951).

Almost surely, 2^125613101 is an apocalyptic number.

It is an amenable number.

125613101 is a deficient number, since it is larger than the sum of its proper divisors (30703).

125613101 is an equidigital number, since it uses as much as digits as its factorization.

125613101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30702.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 125613101 is about 11207.7250590831. The cubic root of 125613101 is about 500.8161351221.

Adding to 125613101 its reverse (101316521), we get a palindrome (226929622).

The spelling of 125613101 in words is "one hundred twenty-five million, six hundred thirteen thousand, one hundred one".