125449749 has 16 divisors (see below), whose sum is σ = 196784640. Its totient is φ = 78713280.

The previous prime is 125449747. The next prime is 125449757. The reversal of 125449749 is 947944521.

125449749 is a `hidden beast` number, since 12 + 544 + 97 + 4 + 9 = 666.

It is not a de Polignac number, because 125449749 - 2¹ = 125449747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125449747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136197 + ... + 137114.

It is an arithmetic number, because the mean of its divisors is an integer number (12299040).

Almost surely, 2^125449749 is an apocalyptic number.

It is an amenable number.

125449749 is a deficient number, since it is larger than the sum of its proper divisors (71334891).

125449749 is a wasteful number, since it uses less digits than its factorization.

125449749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273337 (or 273331 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 125449749 is about 11200.4352147584. The cubic root of 125449749 is about 500.5989475705.

The spelling of 125449749 in words is "one hundred twenty-five million, four hundred forty-nine thousand, seven hundred forty-nine".