61157072 has 10 divisors (see below), whose sum is σ = 118491858. Its totient is φ = 30578528.

The previous prime is 61157039. The next prime is 61157077. The reversal of 61157072 is 27075116.

61157072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 60777616 + 379456 = 7796^2 + 616^2 .

It is a super-2 number, since 2×61157072² = 7480374911226368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61157077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1911143 + ... + 1911174.

Almost surely, 2^61157072 is an apocalyptic number.

It is an amenable number.

61157072 is a deficient number, since it is larger than the sum of its proper divisors (57334786).

61157072 is a wasteful number, since it uses less digits than its factorization.

61157072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822325 (or 3822319 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 61157072 is about 7820.2987155223. The cubic root of 61157072 is about 393.9873049411.

The spelling of 61157072 in words is "sixty-one million, one hundred fifty-seven thousand, seventy-two".