121533445 has 8 divisors (see below), whose sum is σ = 159098400. Its totient is φ = 88387920.

The previous prime is 121533431. The next prime is 121533487. The reversal of 121533445 is 544335121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121533445 - 2⁵ = 121533413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1104795 + ... + 1104904.

It is an arithmetic number, because the mean of its divisors is an integer number (19887300).

Almost surely, 2^121533445 is an apocalyptic number.

It is an amenable number.

121533445 is a deficient number, since it is larger than the sum of its proper divisors (37564955).

121533445 is a wasteful number, since it uses less digits than its factorization.

121533445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209715.

The product of its digits is 7200, while the sum is 28.

The square root of 121533445 is about 11024.2208341452. The cubic root of 121533445 is about 495.3345288262.

Adding to 121533445 its reverse (544335121), we get a palindrome (665868566).

The spelling of 121533445 in words is "one hundred twenty-one million, five hundred thirty-three thousand, four hundred forty-five".