61154712 has 72 divisors (see below), whose sum is σ = 176003100. Its totient is φ = 19179264.

The previous prime is 61154699. The next prime is 61154713. The reversal of 61154712 is 21745116.

It is a happy number.

61154712 is a `hidden beast` number, since 611 + 5 + 47 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61154713) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19339 + ... + 22277.

Almost surely, 2^61154712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61154712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88001550).

61154712 is an abundant number, since it is smaller than the sum of its proper divisors (114848388).

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

61154712 is a wasteful number, since it uses less digits than its factorization.

61154712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985 (or 2961 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 61154712 is about 7820.1478246898. The cubic root of 61154712 is about 393.9822369963.

Adding to 61154712 its reverse (21745116), we get a palindrome (82899828).

The spelling of 61154712 in words is "sixty-one million, one hundred fifty-four thousand, seven hundred twelve".