133124261 has 16 divisors (see below), whose sum is σ = 141980160. Its totient is φ = 124597440.

The previous prime is 133124249. The next prime is 133124273. The reversal of 133124261 is 162421331.

It is an interprime number because it is at equal distance from previous prime (133124249) and next prime (133124273).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133124261 is a prime.

It is a super-2 number, since 2×133124261² = 35444137733592242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133124231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317510 + ... + 317928.

It is an arithmetic number, because the mean of its divisors is an integer number (8873760).

Almost surely, 2^133124261 is an apocalyptic number.

It is an amenable number.

133124261 is a deficient number, since it is larger than the sum of its proper divisors (8855899).

133124261 is a wasteful number, since it uses less digits than its factorization.

133124261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its digits is 864, while the sum is 23.

The square root of 133124261 is about 11537.9487345022. The cubic root of 133124261 is about 510.6057917374.

Adding to 133124261 its reverse (162421331), we get a palindrome (295545592).

The spelling of 133124261 in words is "one hundred thirty-three million, one hundred twenty-four thousand, two hundred sixty-one".