125161261 has 8 divisors (see below), whose sum is σ = 129618720. Its totient is φ = 120774192.

The previous prime is 125161247. The next prime is 125161273. The reversal of 125161261 is 162161521.

It is a happy number.

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 125161261 - 2⁷ = 125161133 is a prime.

It is a super-2 number, since 2×125161261² = 31330682510220242, 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 (125161241) 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, 13966 + ... + 21103.

It is an arithmetic number, because the mean of its divisors is an integer number (16202340).

Almost surely, 2^125161261 is an apocalyptic number.

It is an amenable number.

125161261 is a deficient number, since it is larger than the sum of its proper divisors (4457459).

125161261 is an equidigital number, since it uses as much as digits as its factorization.

125161261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35195.

The product of its digits is 720, while the sum is 25.

The square root of 125161261 is about 11187.5493741927. The cubic root of 125161261 is about 500.2149222703.

The spelling of 125161261 in words is "one hundred twenty-five million, one hundred sixty-one thousand, two hundred sixty-one".