61125421 has 24 divisors (see below), whose sum is σ = 77402304. Its totient is φ = 47118720.

The previous prime is 61125419. The next prime is 61125431. The reversal of 61125421 is 12452116.

It is not a de Polignac number, because 61125421 - 2¹ = 61125419 is a prime.

It is a super-3 number, since 3×61125421³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61125392 and 61125401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61125401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62466 + ... + 63436.

It is an arithmetic number, because the mean of its divisors is an integer number (3225096).

Almost surely, 2^61125421 is an apocalyptic number.

It is an amenable number.

61125421 is a deficient number, since it is larger than the sum of its proper divisors (16276883).

61125421 is a wasteful number, since it uses less digits than its factorization.

61125421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1018 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

The square root of 61125421 is about 7818.2748097007. The cubic root of 61125421 is about 393.9193256454.

Adding to 61125421 its reverse (12452116), we get a palindrome (73577537).

The spelling of 61125421 in words is "sixty-one million, one hundred twenty-five thousand, four hundred twenty-one".