61421443 has 4 divisors (see below), whose sum is σ = 63081520. Its totient is φ = 59761368.

The previous prime is 61421441. The next prime is 61421453. The reversal of 61421443 is 34412416.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61421443 - 2¹ = 61421441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61421441) 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, 829983 + ... + 830056.

It is an arithmetic number, because the mean of its divisors is an integer number (15770380).

Almost surely, 2^61421443 is an apocalyptic number.

61421443 is a deficient number, since it is larger than the sum of its proper divisors (1660077).

61421443 is a wasteful number, since it uses less digits than its factorization.

61421443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660076.

The product of its digits is 2304, while the sum is 25.

The square root of 61421443 is about 7837.1833588350. The cubic root of 61421443 is about 394.5542008982.

Adding to 61421443 its reverse (34412416), we get a palindrome (95833859).

The spelling of 61421443 in words is "sixty-one million, four hundred twenty-one thousand, four hundred forty-three".