125691247 has 12 divisors (see below), whose sum is σ = 138449016. Its totient is φ = 113162240.

The previous prime is 125691239. The next prime is 125691277. The reversal of 125691247 is 742196521.

It is not a de Polignac number, because 125691247 - 2³ = 125691239 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 (125691277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488943 + ... + 489199.

It is an arithmetic number, because the mean of its divisors is an integer number (11537418).

Almost surely, 2^125691247 is an apocalyptic number.

125691247 is a deficient number, since it is larger than the sum of its proper divisors (12757769).

125691247 is an equidigital number, since it uses as much as digits as its factorization.

125691247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 441 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 125691247 is about 11211.2107731502. The cubic root of 125691247 is about 500.9199689428.

The spelling of 125691247 in words is "one hundred twenty-five million, six hundred ninety-one thousand, two hundred forty-seven".