61421172 has 12 divisors (see below), whose sum is σ = 143316096. Its totient is φ = 20473720.

The previous prime is 61421123. The next prime is 61421179. The reversal of 61421172 is 27112416.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61421179) 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, 2559204 + ... + 2559227.

It is an arithmetic number, because the mean of its divisors is an integer number (11943008).

Almost surely, 2^61421172 is an apocalyptic number.

It is an amenable number.

61421172 is an abundant number, since it is smaller than the sum of its proper divisors (81894924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61421172 is a wasteful number, since it uses less digits than its factorization.

61421172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5118438 (or 5118436 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 61421172 is about 7837.1660694412. The cubic root of 61421172 is about 394.5536206213.

Adding to 61421172 its reverse (27112416), we get a palindrome (88533588).

The spelling of 61421172 in words is "sixty-one million, four hundred twenty-one thousand, one hundred seventy-two".