125608949 has 4 divisors (see below), whose sum is σ = 126409164. Its totient is φ = 124808736.

The previous prime is 125608927. The next prime is 125608991. The reversal of 125608949 is 949806521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949806521 = 29 ⋅32751949.

It can be written as a sum of positive squares in 2 ways, for example, as 35700625 + 89908324 = 5975^2 + 9482^2 .

It is a cyclic number.

It is not a de Polignac number, because 125608949 - 2¹⁶ = 125543413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125608909) 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, 399872 + ... + 400185.

It is an arithmetic number, because the mean of its divisors is an integer number (31602291).

Almost surely, 2^125608949 is an apocalyptic number.

It is an amenable number.

125608949 is a deficient number, since it is larger than the sum of its proper divisors (800215).

125608949 is an equidigital number, since it uses as much as digits as its factorization.

125608949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800214.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 125608949 is about 11207.5398281692. The cubic root of 125608949 is about 500.8106170897.

The spelling of 125608949 in words is "one hundred twenty-five million, six hundred eight thousand, nine hundred forty-nine".