61145072 has 20 divisors (see below), whose sum is σ = 118637496. Its totient is φ = 30528960.

The previous prime is 61145069. The next prime is 61145083. The reversal of 61145072 is 27054116.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10922 + ... + 15542.

Almost surely, 2^61145072 is an apocalyptic number.

It is an amenable number.

61145072 is a deficient number, since it is larger than the sum of its proper divisors (57492424).

61145072 is a wasteful number, since it uses less digits than its factorization.

61145072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456 (or 5450 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 61145072 is about 7819.5314437631. The cubic root of 61145072 is about 393.9615343760.

Adding to 61145072 its reverse (27054116), we get a palindrome (88199188).

The spelling of 61145072 in words is "sixty-one million, one hundred forty-five thousand, seventy-two".