125142947 has 4 divisors (see below), whose sum is σ = 128195256. Its totient is φ = 122090640.

The previous prime is 125142923. The next prime is 125142959. The reversal of 125142947 is 749241521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125142947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125142847) 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, 1526093 + ... + 1526174.

It is an arithmetic number, because the mean of its divisors is an integer number (32048814).

Almost surely, 2^125142947 is an apocalyptic number.

125142947 is a deficient number, since it is larger than the sum of its proper divisors (3052309).

125142947 is an equidigital number, since it uses as much as digits as its factorization.

125142947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3052308.

The product of its digits is 20160, while the sum is 35.

The square root of 125142947 is about 11186.7308450682. The cubic root of 125142947 is about 500.1905233925.

The spelling of 125142947 in words is "one hundred twenty-five million, one hundred forty-two thousand, nine hundred forty-seven".