61122740 has 24 divisors (see below), whose sum is σ = 146694912. Its totient is φ = 20956320.

The previous prime is 61122709. The next prime is 61122757. The reversal of 61122740 is 4722116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218156 + ... + 218435.

It is an arithmetic number, because the mean of its divisors is an integer number (6112288).

Almost surely, 2^61122740 is an apocalyptic number.

It is an amenable number.

61122740 is an abundant number, since it is smaller than the sum of its proper divisors (85572172).

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

61122740 is a wasteful number, since it uses less digits than its factorization.

61122740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436607 (or 436605 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 61122740 is about 7818.1033505576. The cubic root of 61122740 is about 393.9135663768.

Adding to 61122740 its reverse (4722116), we get a palindrome (65844856).

The spelling of 61122740 in words is "sixty-one million, one hundred twenty-two thousand, seven hundred forty".