61421361 has 4 divisors (see below), whose sum is σ = 81895152. Its totient is φ = 40947572.

The previous prime is 61421359. The next prime is 61421377. The reversal of 61421361 is 16312416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61421361 - 2¹ = 61421359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61421341) 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, 10236891 + ... + 10236896.

It is an arithmetic number, because the mean of its divisors is an integer number (20473788).

Almost surely, 2^61421361 is an apocalyptic number.

It is an amenable number.

61421361 is a deficient number, since it is larger than the sum of its proper divisors (20473791).

61421361 is a wasteful number, since it uses less digits than its factorization.

61421361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20473790.

The product of its digits is 864, while the sum is 24.

The square root of 61421361 is about 7837.1781273619. The cubic root of 61421361 is about 394.5540253165.

Adding to 61421361 its reverse (16312416), we get a palindrome (77733777).

It can be divided in two parts, 6142 and 1361, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 61421361 in words is "sixty-one million, four hundred twenty-one thousand, three hundred sixty-one".