61070140 has 12 divisors (see below), whose sum is σ = 128247336. Its totient is φ = 24428048.

The previous prime is 61070071. The next prime is 61070147. The reversal of 61070140 is 4107016.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61070147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526734 + ... + 1526773.

It is an arithmetic number, because the mean of its divisors is an integer number (10687278).

Almost surely, 2^61070140 is an apocalyptic number.

It is an amenable number.

61070140 is an abundant number, since it is smaller than the sum of its proper divisors (67177196).

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

61070140 is a wasteful number, since it uses less digits than its factorization.

61070140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3053516 (or 3053514 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 61070140 is about 7814.7386392636. The cubic root of 61070140 is about 393.8005380668.

Adding to 61070140 its reverse (4107016), we get a palindrome (65177156).

The spelling of 61070140 in words is "sixty-one million, seventy thousand, one hundred forty".