61420131 has 6 divisors (see below), whose sum is σ = 88717980. Its totient is φ = 40946748.

The previous prime is 61420123. The next prime is 61420147. The reversal of 61420131 is 13102416.

It is a happy number.

61420131 is a `hidden beast` number, since 614 + 20 + 1 + 31 = 666.

61420131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61420131 - 2³ = 61420123 is a prime.

It is a super-2 number, since 2×61420131² = 7544864984114322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61420171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3412221 + ... + 3412238.

It is an arithmetic number, because the mean of its divisors is an integer number (14786330).

Almost surely, 2^61420131 is an apocalyptic number.

61420131 is a deficient number, since it is larger than the sum of its proper divisors (27297849).

61420131 is a wasteful number, since it uses less digits than its factorization.

61420131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6824465 (or 6824462 counting only the distinct ones).

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

The square root of 61420131 is about 7837.0996548468. The cubic root of 61420131 is about 394.5513915710.

Adding to 61420131 its reverse (13102416), we get a palindrome (74522547).

The spelling of 61420131 in words is "sixty-one million, four hundred twenty thousand, one hundred thirty-one".