61152140 has 24 divisors (see below), whose sum is σ = 146765472. Its totient is φ = 20966400.

The previous prime is 61152139. The next prime is 61152199. The reversal of 61152140 is 4125116.

61152140 is digitally balanced in base 2 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×61152140⁴ (a number of 32 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

61152140 is strictly pandigital in base 9.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 218261 + ... + 218540.

It is an arithmetic number, because the mean of its divisors is an integer number (6115228).

Almost surely, 2^61152140 is an apocalyptic number.

It is an amenable number.

61152140 is an abundant number, since it is smaller than the sum of its proper divisors (85613332).

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

61152140 is a wasteful number, since it uses less digits than its factorization.

61152140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436817 (or 436815 counting only the distinct ones).

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

The square root of 61152140 is about 7819.9833759414. The cubic root of 61152140 is about 393.9767136469.

Adding to 61152140 its reverse (4125116), we get a palindrome (65277256).

The spelling of 61152140 in words is "sixty-one million, one hundred fifty-two thousand, one hundred forty".