125401571 has 4 divisors (see below), whose sum is σ = 132778152. Its totient is φ = 118024992.

The previous prime is 125401567. The next prime is 125401583. The reversal of 125401571 is 175104521.

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

It is a cyclic number.

It is not a de Polignac number, because 125401571 - 2² = 125401567 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125401571.

It is not an unprimeable number, because it can be changed into a prime (125401511) 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, 3688265 + ... + 3688298.

It is an arithmetic number, because the mean of its divisors is an integer number (33194538).

Almost surely, 2^125401571 is an apocalyptic number.

125401571 is a deficient number, since it is larger than the sum of its proper divisors (7376581).

125401571 is an equidigital number, since it uses as much as digits as its factorization.

125401571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7376580.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 125401571 is about 11198.2842882292. The cubic root of 125401571 is about 500.5348556548.

The spelling of 125401571 in words is "one hundred twenty-five million, four hundred one thousand, five hundred seventy-one".