61140321 has 12 divisors (see below), whose sum is σ = 96342480. Its totient is φ = 37054680.

The previous prime is 61140311. The next prime is 61140341. The reversal of 61140321 is 12304116.

It is a happy number.

It is not a de Polignac number, because 61140321 - 2⁶ = 61140257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61140294 and 61140303.

It is not an unprimeable number, because it can be changed into a prime (61140311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308691 + ... + 308888.

It is an arithmetic number, because the mean of its divisors is an integer number (8028540).

Almost surely, 2^61140321 is an apocalyptic number.

It is an amenable number.

61140321 is a deficient number, since it is larger than the sum of its proper divisors (35202159).

61140321 is a wasteful number, since it uses less digits than its factorization.

61140321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617596 (or 617593 counting only the distinct ones).

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

The square root of 61140321 is about 7819.2276472808. The cubic root of 61140321 is about 393.9513304480.

Adding to 61140321 its reverse (12304116), we get a palindrome (73444437).

The spelling of 61140321 in words is "sixty-one million, one hundred forty thousand, three hundred twenty-one".