201124861 has 24 divisors (see below), whose sum is σ = 247380000. Its totient is φ = 162588384.

The previous prime is 201124849. The next prime is 201124879. The reversal of 201124861 is 168421102.

It is not a de Polignac number, because 201124861 - 2⁵ = 201124829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201124801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 324610 + ... + 325228.

It is an arithmetic number, because the mean of its divisors is an integer number (10307500).

Almost surely, 2^201124861 is an apocalyptic number.

It is an amenable number.

201124861 is a deficient number, since it is larger than the sum of its proper divisors (46255139).

201124861 is a wasteful number, since it uses less digits than its factorization.

201124861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 201124861 is about 14181.8497030535. The cubic root of 201124861 is about 585.8978697714.

Adding to 201124861 its reverse (168421102), we get a palindrome (369545963).

The spelling of 201124861 in words is "two hundred one million, one hundred twenty-four thousand, eight hundred sixty-one".