133742541 has 4 divisors (see below), whose sum is σ = 178323392. Its totient is φ = 89161692.

The previous prime is 133742537. The next prime is 133742569. The reversal of 133742541 is 145247331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 145247331 = 3 ⋅48415777.

It is not a de Polignac number, because 133742541 - 2² = 133742537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133742499 and 133742508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133743541) 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, 22290421 + ... + 22290426.

It is an arithmetic number, because the mean of its divisors is an integer number (44580848).

Almost surely, 2^133742541 is an apocalyptic number.

It is an amenable number.

133742541 is a deficient number, since it is larger than the sum of its proper divisors (44580851).

133742541 is an equidigital number, since it uses as much as digits as its factorization.

133742541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44580850.

The product of its digits is 10080, while the sum is 30.

The square root of 133742541 is about 11564.7110210329. The cubic root of 133742541 is about 511.3950540000.

Adding to 133742541 its reverse (145247331), we get a palindrome (278989872).

The spelling of 133742541 in words is "one hundred thirty-three million, seven hundred forty-two thousand, five hundred forty-one".