125640463 has 4 divisors (see below), whose sum is σ = 135305128. Its totient is φ = 115975800.

The previous prime is 125640461. The next prime is 125640481. The reversal of 125640463 is 364046521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364046521 = 101 ⋅3604421.

It is a cyclic number.

It is not a de Polignac number, because 125640463 - 2¹ = 125640461 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 (125640461) 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, 4832313 + ... + 4832338.

It is an arithmetic number, because the mean of its divisors is an integer number (33826282).

Almost surely, 2^125640463 is an apocalyptic number.

125640463 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

125640463 is a deficient number, since it is larger than the sum of its proper divisors (9664665).

125640463 is an equidigital number, since it uses as much as digits as its factorization.

125640463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9664664.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 125640463 is about 11208.9456685274. The cubic root of 125640463 is about 500.8524963406.

Adding to 125640463 its reverse (364046521), we get a palindrome (489686984).

The spelling of 125640463 in words is "one hundred twenty-five million, six hundred forty thousand, four hundred sixty-three".