125281761 has 16 divisors (see below), whose sum is σ = 183396288. Its totient is φ = 75441600.

The previous prime is 125281753. The next prime is 125281799. The reversal of 125281761 is 167182521.

It is not a de Polignac number, because 125281761 - 2³ = 125281753 is a prime.

It is a super-2 number, since 2×125281761² = 31391039278522242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (125281061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6910 + ... + 17271.

It is an arithmetic number, because the mean of its divisors is an integer number (11462268).

Almost surely, 2^125281761 is an apocalyptic number.

125281761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125281761 is a deficient number, since it is larger than the sum of its proper divisors (58114527).

125281761 is a wasteful number, since it uses less digits than its factorization.

125281761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24352.

The product of its digits is 6720, while the sum is 33.

The square root of 125281761 is about 11192.9335296874. The cubic root of 125281761 is about 500.3753994134.

The spelling of 125281761 in words is "one hundred twenty-five million, two hundred eighty-one thousand, seven hundred sixty-one".