125212501 has 4 divisors (see below), whose sum is σ = 125655232. Its totient is φ = 124769772.

The previous prime is 125212453. The next prime is 125212511. The reversal of 125212501 is 105212521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125212501 - 2¹³ = 125204309 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125212511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220941 + ... + 221506.

It is an arithmetic number, because the mean of its divisors is an integer number (31413808).

Almost surely, 2^125212501 is an apocalyptic number.

It is an amenable number.

125212501 is a deficient number, since it is larger than the sum of its proper divisors (442731).

125212501 is an equidigital number, since it uses as much as digits as its factorization.

125212501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442730.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 125212501 is about 11189.8391856184. The cubic root of 125212501 is about 500.2831742611.

The spelling of 125212501 in words is "one hundred twenty-five million, two hundred twelve thousand, five hundred one".