121535493 has 4 divisors (see below), whose sum is σ = 162047328. Its totient is φ = 81023660.

The previous prime is 121535483. The next prime is 121535497. The reversal of 121535493 is 394535121.

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.

It is a cyclic number.

It is not a de Polignac number, because 121535493 - 2⁹ = 121534981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121535497) 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, 20255913 + ... + 20255918.

It is an arithmetic number, because the mean of its divisors is an integer number (40511832).

Almost surely, 2^121535493 is an apocalyptic number.

It is an amenable number.

121535493 is a deficient number, since it is larger than the sum of its proper divisors (40511835).

121535493 is an equidigital number, since it uses as much as digits as its factorization.

121535493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40511834.

The product of its digits is 16200, while the sum is 33.

The square root of 121535493 is about 11024.3137201370. The cubic root of 121535493 is about 495.3373111588.

The spelling of 121535493 in words is "one hundred twenty-one million, five hundred thirty-five thousand, four hundred ninety-three".