61140521 has 8 divisors (see below), whose sum is σ = 65904384. Its totient is φ = 56385360.

The previous prime is 61140473. The next prime is 61140523. The reversal of 61140521 is 12504116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61140521 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61140493 and 61140502.

It is not an unprimeable number, because it can be changed into a prime (61140523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26600 + ... + 28806.

It is an arithmetic number, because the mean of its divisors is an integer number (8238048).

Almost surely, 2^61140521 is an apocalyptic number.

It is an amenable number.

61140521 is a deficient number, since it is larger than the sum of its proper divisors (4763863).

61140521 is a wasteful number, since it uses less digits than its factorization.

61140521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4351.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 61140521 is about 7819.2404362572. The cubic root of 61140521 is about 393.9517600073.

Adding to 61140521 its reverse (12504116), we get a palindrome (73644637).

The spelling of 61140521 in words is "sixty-one million, one hundred forty thousand, five hundred twenty-one".