61134540 has 48 divisors (see below), whose sum is σ = 171950688. Its totient is φ = 16228864.

The previous prime is 61134497. The next prime is 61134547. The reversal of 61134540 is 4543116.

It is a self number, because there is not a number n which added to its sum of digits gives 61134540.

It is not an unprimeable number, because it can be changed into a prime (61134547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11794 + ... + 16166.

It is an arithmetic number, because the mean of its divisors is an integer number (3582306).

Almost surely, 2^61134540 is an apocalyptic number.

61134540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61134540 is an abundant number, since it is smaller than the sum of its proper divisors (110816148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61134540 is a wasteful number, since it uses less digits than its factorization.

61134540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618 (or 4616 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 61134540 is about 7818.8579728756. The cubic root of 61134540 is about 393.9389136316.

Adding to 61134540 its reverse (4543116), we get a palindrome (65677656).

The spelling of 61134540 in words is "sixty-one million, one hundred thirty-four thousand, five hundred forty".