61521054 has 16 divisors (see below), whose sum is σ = 140619648. Its totient is φ = 17577432.

The previous prime is 61521043. The next prime is 61521071. The reversal of 61521054 is 45012516.

It is a Curzon number.

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, 732352 + ... + 732435.

It is an arithmetic number, because the mean of its divisors is an integer number (8788728).

Almost surely, 2^61521054 is an apocalyptic number.

61521054 is an abundant number, since it is smaller than the sum of its proper divisors (79098594).

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

61521054 is a wasteful number, since it uses less digits than its factorization.

61521054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464799.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 61521054 is about 7843.5358098245. The cubic root of 61521054 is about 394.7673767837.

The spelling of 61521054 in words is "sixty-one million, five hundred twenty-one thousand, fifty-four".