125049639 has 16 divisors (see below), whose sum is σ = 195882624. Its totient is φ = 69957600.

The previous prime is 125049623. The next prime is 125049641. The reversal of 125049639 is 936940521.

It is not a de Polignac number, because 125049639 - 2⁴ = 125049623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 125049597 and 125049606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125049439) 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, 145317 + ... + 146174.

It is an arithmetic number, because the mean of its divisors is an integer number (12242664).

Almost surely, 2^125049639 is an apocalyptic number.

125049639 is a deficient number, since it is larger than the sum of its proper divisors (70832985).

125049639 is a wasteful number, since it uses less digits than its factorization.

125049639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291518.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 125049639 is about 11182.5595907198. The cubic root of 125049639 is about 500.0661765743.

The spelling of 125049639 in words is "one hundred twenty-five million, forty-nine thousand, six hundred thirty-nine".