121549447 has 8 divisors (see below), whose sum is σ = 122605056. Its totient is φ = 120498072.

The previous prime is 121549423. The next prime is 121549451. The reversal of 121549447 is 744945121.

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

It is a cyclic number.

It is not a de Polignac number, because 121549447 - 2¹⁵ = 121516679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121549147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83278 + ... + 84724.

It is an arithmetic number, because the mean of its divisors is an integer number (15325632).

Almost surely, 2^121549447 is an apocalyptic number.

121549447 is a deficient number, since it is larger than the sum of its proper divisors (1055609).

121549447 is a wasteful number, since it uses less digits than its factorization.

121549447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117.

The product of its digits is 40320, while the sum is 37.

The square root of 121549447 is about 11024.9465758343. The cubic root of 121549447 is about 495.3562676852.

The spelling of 121549447 in words is "one hundred twenty-one million, five hundred forty-nine thousand, four hundred forty-seven".