125731345 has 16 divisors (see below), whose sum is σ = 154522368. Its totient is φ = 98167680.

The previous prime is 125731321. The next prime is 125731349. The reversal of 125731345 is 543137521.

It is a happy number.

It is not a de Polignac number, because 125731345 - 2⁹ = 125730833 is a prime.

It is a super-2 number, since 2×125731345² = 31616742231018050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125731349) 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 15 ways as a sum of consecutive naturals, for example, 133717 + ... + 134653.

It is an arithmetic number, because the mean of its divisors is an integer number (9657648).

Almost surely, 2^125731345 is an apocalyptic number.

It is an amenable number.

125731345 is a deficient number, since it is larger than the sum of its proper divisors (28791023).

125731345 is an equidigital number, since it uses as much as digits as its factorization.

125731345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560.

The product of its digits is 12600, while the sum is 31.

The square root of 125731345 is about 11212.9989298136. The cubic root of 125731345 is about 500.9732310801.

Adding to 125731345 its reverse (543137521), we get a palindrome (668868866).

The spelling of 125731345 in words is "one hundred twenty-five million, seven hundred thirty-one thousand, three hundred forty-five".