125747477 has 4 divisors (see below), whose sum is σ = 127160460. Its totient is φ = 124334496.

The previous prime is 125747441. The next prime is 125747519. The reversal of 125747477 is 774747521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 774747521 = 41 ⋅18896281.

It can be written as a sum of positive squares in 2 ways, for example, as 6522916 + 119224561 = 2554^2 + 10919^2 .

It is a cyclic number.

It is not a de Polignac number, because 125747477 - 2¹⁸ = 125485333 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 (125747077) 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, 706358 + ... + 706535.

It is an arithmetic number, because the mean of its divisors is an integer number (31790115).

Almost surely, 2^125747477 is an apocalyptic number.

It is an amenable number.

125747477 is a deficient number, since it is larger than the sum of its proper divisors (1412983).

125747477 is an equidigital number, since it uses as much as digits as its factorization.

125747477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412982.

The product of its digits is 384160, while the sum is 44.

The square root of 125747477 is about 11213.7182504288. The cubic root of 125747477 is about 500.9946560068.

Adding to 125747477 its sum of digits (44), we get a palindrome (125747521).

The spelling of 125747477 in words is "one hundred twenty-five million, seven hundred forty-seven thousand, four hundred seventy-seven".