61111421 has 8 divisors (see below), whose sum is σ = 71328000. Its totient is φ = 51266448.

The previous prime is 61111409. The next prime is 61111423. The reversal of 61111421 is 12411116.

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 61111421 - 2¹⁰ = 61110397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61111421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61111423) 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, 92546 + ... + 93203.

It is an arithmetic number, because the mean of its divisors is an integer number (8916000).

Almost surely, 2^61111421 is an apocalyptic number.

It is an amenable number.

61111421 is a deficient number, since it is larger than the sum of its proper divisors (10216579).

61111421 is a wasteful number, since it uses less digits than its factorization.

61111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185803.

The product of its digits is 48, while the sum is 17.

The square root of 61111421 is about 7817.3794202405. The cubic root of 61111421 is about 393.8892492791.

Adding to 61111421 its reverse (12411116), we get a palindrome (73522537).

The spelling of 61111421 in words is "sixty-one million, one hundred eleven thousand, four hundred twenty-one".