125742047 has 4 divisors (see below), whose sum is σ = 133138656. Its totient is φ = 118345440.

The previous prime is 125742037. The next prime is 125742077. The reversal of 125742047 is 740247521.

125742047 is nontrivially palindromic in base 8.

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-125742047 is a prime.

It is a super-2 number, since 2×125742047² = 31622124767500418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125742017) 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, 3698279 + ... + 3698312.

It is an arithmetic number, because the mean of its divisors is an integer number (33284664).

Almost surely, 2^125742047 is an apocalyptic number.

125742047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

125742047 is a deficient number, since it is larger than the sum of its proper divisors (7396609).

125742047 is an equidigital number, since it uses as much as digits as its factorization.

125742047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7396608.

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 125742047 is about 11213.4761336528. The cubic root of 125742047 is about 500.9874446225.

Adding to 125742047 its reverse (740247521), we get a palindrome (865989568).

The spelling of 125742047 in words is "one hundred twenty-five million, seven hundred forty-two thousand, forty-seven".