125722551 has 8 divisors (see below), whose sum is σ = 167968000. Its totient is φ = 83646072.

The previous prime is 125722549. The next prime is 125722567. The reversal of 125722551 is 155227521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125722551 - 2¹ = 125722549 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 (125722501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40495 + ... + 43488.

It is an arithmetic number, because the mean of its divisors is an integer number (20996000).

Almost surely, 2^125722551 is an apocalyptic number.

125722551 is a deficient number, since it is larger than the sum of its proper divisors (42245449).

125722551 is an equidigital number, since it uses as much as digits as its factorization.

125722551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84485.

The product of its digits is 7000, while the sum is 30.

The square root of 125722551 is about 11212.6067887891. The cubic root of 125722551 is about 500.9615509874.

The spelling of 125722551 in words is "one hundred twenty-five million, seven hundred twenty-two thousand, five hundred fifty-one".