61103421 has 6 divisors (see below), whose sum is σ = 88260510. Its totient is φ = 40735608.

The previous prime is 61103417. The next prime is 61103429. The reversal of 61103421 is 12430116.

It is a happy number.

61103421 is a `hidden beast` number, since 611 + 0 + 34 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54022500 + 7080921 = 7350^2 + 2661^2 .

It is not a de Polignac number, because 61103421 - 2² = 61103417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61103394 and 61103403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61103429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3394626 + ... + 3394643.

It is an arithmetic number, because the mean of its divisors is an integer number (14710085).

Almost surely, 2^61103421 is an apocalyptic number.

It is an amenable number.

61103421 is a deficient number, since it is larger than the sum of its proper divisors (27157089).

61103421 is a wasteful number, since it uses less digits than its factorization.

61103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6789275 (or 6789272 counting only the distinct ones).

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

The square root of 61103421 is about 7816.8677230717. The cubic root of 61103421 is about 393.8720607217.

Adding to 61103421 its reverse (12430116), we get a palindrome (73533537).

The spelling of 61103421 in words is "sixty-one million, one hundred three thousand, four hundred twenty-one".