61162140 has 96 divisors (see below), whose sum is σ = 194181120. Its totient is φ = 14259456.

The previous prime is 61162139. The next prime is 61162151. The reversal of 61162140 is 4126116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12757 + ... + 16883.

It is an arithmetic number, because the mean of its divisors is an integer number (2022720).

Almost surely, 2^61162140 is an apocalyptic number.

61162140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61162140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97090560).

61162140 is an abundant number, since it is smaller than the sum of its proper divisors (133018980).

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

61162140 is a wasteful number, since it uses less digits than its factorization.

61162140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4171 (or 4169 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61162140 is about 7820.6227373528. The cubic root of 61162140 is about 393.9981876973.

Adding to 61162140 its reverse (4126116), we get a palindrome (65288256).

It can be divided in two parts, 6116 and 2140, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 61162140 in words is "sixty-one million, one hundred sixty-two thousand, one hundred forty".