125520011 has 4 divisors (see below), whose sum is σ = 127393512. Its totient is φ = 123646512.

The previous prime is 125520007. The next prime is 125520013. The reversal of 125520011 is 110025521.

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 125520011 - 2² = 125520007 is a prime.

It is a super-2 number, since 2×125520011² = 31510546322880242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125520013) 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, 936650 + ... + 936783.

It is an arithmetic number, because the mean of its divisors is an integer number (31848378).

Almost surely, 2^125520011 is an apocalyptic number.

125520011 is a deficient number, since it is larger than the sum of its proper divisors (1873501).

125520011 is an equidigital number, since it uses as much as digits as its factorization.

125520011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873500.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 125520011 is about 11203.5713502436. The cubic root of 125520011 is about 500.6923887531.

Adding to 125520011 its reverse (110025521), we get a palindrome (235545532).

The spelling of 125520011 in words is "one hundred twenty-five million, five hundred twenty thousand, eleven".