61149020 has 12 divisors (see below), whose sum is σ = 128412984. Its totient is φ = 24459600.

The previous prime is 61149013. The next prime is 61149031. The reversal of 61149020 is 2094116.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1528706 + ... + 1528745.

It is an arithmetic number, because the mean of its divisors is an integer number (10701082).

Almost surely, 2^61149020 is an apocalyptic number.

It is an amenable number.

61149020 is an abundant number, since it is smaller than the sum of its proper divisors (67263964).

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

61149020 is a wasteful number, since it uses less digits than its factorization.

61149020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057460 (or 3057458 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 61149020 is about 7819.7838844817. The cubic root of 61149020 is about 393.9700132640.

The spelling of 61149020 in words is "sixty-one million, one hundred forty-nine thousand, twenty".