61489121 has 4 divisors (see below), whose sum is σ = 62180100. Its totient is φ = 60798144.

The previous prime is 61489117. The next prime is 61489133. The reversal of 61489121 is 12198416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30129121 + 31360000 = 5489^2 + 5600^2 .

It is a cyclic number.

It is not a de Polignac number, because 61489121 - 2² = 61489117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61489321) 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, 345356 + ... + 345533.

It is an arithmetic number, because the mean of its divisors is an integer number (15545025).

Almost surely, 2^61489121 is an apocalyptic number.

It is an amenable number.

61489121 is a deficient number, since it is larger than the sum of its proper divisors (690979).

61489121 is an equidigital number, since it uses as much as digits as its factorization.

61489121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690978.

The product of its digits is 3456, while the sum is 32.

The square root of 61489121 is about 7841.4999202959. The cubic root of 61489121 is about 394.6990625641.

The spelling of 61489121 in words is "sixty-one million, four hundred eighty-nine thousand, one hundred twenty-one".