133123641 has 48 divisors (see below), whose sum is σ = 215728128. Its totient is φ = 72727200.

The previous prime is 133123631. The next prime is 133123649. The reversal of 133123641 is 146321331.

It is a happy number.

It is not a de Polignac number, because 133123641 - 2¹⁷ = 132992569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133123649) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 596856 + ... + 597078.

It is an arithmetic number, because the mean of its divisors is an integer number (4494336).

Almost surely, 2^133123641 is an apocalyptic number.

It is an amenable number.

133123641 is a deficient number, since it is larger than the sum of its proper divisors (82604487).

133123641 is a wasteful number, since it uses less digits than its factorization.

133123641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 395 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 133123641 is about 11537.9218666101. The cubic root of 133123641 is about 510.6049990543.

Adding to 133123641 its reverse (146321331), we get a palindrome (279444972).

The spelling of 133123641 in words is "one hundred thirty-three million, one hundred twenty-three thousand, six hundred forty-one".