61013421 has 12 divisors (see below), whose sum is σ = 100720672. Its totient is φ = 34864776.

The previous prime is 61013417. The next prime is 61013437. The reversal of 61013421 is 12431016.

It is a happy number.

61013421 is a `hidden beast` number, since 610 + 1 + 34 + 21 = 666.

It is not a de Polignac number, because 61013421 - 2² = 61013417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 61013394 and 61013403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61013401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 484171 + ... + 484296.

Almost surely, 2^61013421 is an apocalyptic number.

It is an amenable number.

61013421 is a deficient number, since it is larger than the sum of its proper divisors (39707251).

61013421 is a wasteful number, since it uses less digits than its factorization.

61013421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968480 (or 968477 counting only the distinct ones).

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

The square root of 61013421 is about 7811.1088201356. The cubic root of 61013421 is about 393.6785859903.

Adding to 61013421 its reverse (12431016), we get a palindrome (73444437).

The spelling of 61013421 in words is "sixty-one million, thirteen thousand, four hundred twenty-one".