125544215 has 4 divisors (see below), whose sum is σ = 150653064. Its totient is φ = 100435368.

The previous prime is 125544187. The next prime is 125544233. The reversal of 125544215 is 512445521.

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 125544215 - 2⁶ = 125544151 is a prime.

It is a super-2 number, since 2×125544215² = 31522699839932450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12554417 + ... + 12554426.

It is an arithmetic number, because the mean of its divisors is an integer number (37663266).

Almost surely, 2^125544215 is an apocalyptic number.

125544215 is a deficient number, since it is larger than the sum of its proper divisors (25108849).

125544215 is an equidigital number, since it uses as much as digits as its factorization.

125544215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25108848.

The product of its digits is 8000, while the sum is 29.

The square root of 125544215 is about 11204.6514894485. The cubic root of 125544215 is about 500.7245694909.

Adding to 125544215 its reverse (512445521), we get a palindrome (637989736).

The spelling of 125544215 in words is "one hundred twenty-five million, five hundred forty-four thousand, two hundred fifteen".