61130421 has 12 divisors (see below), whose sum is σ = 96326880. Its totient is φ = 37048680.

The previous prime is 61130417. The next prime is 61130423. The reversal of 61130421 is 12403116.

It is a happy number.

61130421 is a `hidden beast` number, since 611 + 30 + 4 + 21 = 666.

It is not a de Polignac number, because 61130421 - 2² = 61130417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61130394 and 61130403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61130423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308641 + ... + 308838.

It is an arithmetic number, because the mean of its divisors is an integer number (8027240).

Almost surely, 2^61130421 is an apocalyptic number.

It is an amenable number.

61130421 is a deficient number, since it is larger than the sum of its proper divisors (35196459).

61130421 is a wasteful number, since it uses less digits than its factorization.

61130421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617496 (or 617493 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 61130421 is about 7818.5945668004. The cubic root of 61130421 is about 393.9300660918.

Adding to 61130421 its reverse (12403116), we get a palindrome (73533537).

The spelling of 61130421 in words is "sixty-one million, one hundred thirty thousand, four hundred twenty-one".