125381749 has 8 divisors (see below), whose sum is σ = 133934040. Its totient is φ = 116960256.

The previous prime is 125381747. The next prime is 125381771. The reversal of 125381749 is 947183521.

It can be written as a sum of positive squares in 4 ways, for example, as 165649 + 125216100 = 407^2 + 11190^2 .

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 125381749 - 2¹ = 125381747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125381743) 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, 30714 + ... + 34555.

It is an arithmetic number, because the mean of its divisors is an integer number (16741755).

Almost surely, 2^125381749 is an apocalyptic number.

It is an amenable number.

125381749 is a deficient number, since it is larger than the sum of its proper divisors (8552291).

125381749 is a wasteful number, since it uses less digits than its factorization.

125381749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65399.

The product of its digits is 60480, while the sum is 40.

The square root of 125381749 is about 11197.3992069587. The cubic root of 125381749 is about 500.5084813847.

The spelling of 125381749 in words is "one hundred twenty-five million, three hundred eighty-one thousand, seven hundred forty-nine".