61424321 has 16 divisors (see below), whose sum is σ = 74136960. Its totient is φ = 49714560.

The previous prime is 61424303. The next prime is 61424323. The reversal of 61424321 is 12342416.

It is not a de Polignac number, because 61424321 - 2⁶ = 61424257 is a prime.

It is a super-2 number, since 2×61424321² = 7545894420622082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61424323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55445 + ... + 56541.

It is an arithmetic number, because the mean of its divisors is an integer number (4633560).

Almost surely, 2^61424321 is an apocalyptic number.

It is an amenable number.

61424321 is a deficient number, since it is larger than the sum of its proper divisors (12712639).

61424321 is a wasteful number, since it uses less digits than its factorization.

61424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544.

The product of its digits is 1152, while the sum is 23.

The square root of 61424321 is about 7837.3669685680. The cubic root of 61424321 is about 394.5603632915.

Adding to 61424321 its reverse (12342416), we get a palindrome (73766737).

The spelling of 61424321 in words is "sixty-one million, four hundred twenty-four thousand, three hundred twenty-one".