61542372 has 24 divisors (see below), whose sum is σ = 144117792. Its totient is φ = 20440000.

The previous prime is 61542367. The next prime is 61542401. The reversal of 61542372 is 27324516.

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, 5754 + ... + 12497.

It is an arithmetic number, because the mean of its divisors is an integer number (6004908).

Almost surely, 2^61542372 is an apocalyptic number.

It is an amenable number.

61542372 is an abundant number, since it is smaller than the sum of its proper divisors (82575420).

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

61542372 is a wasteful number, since it uses less digits than its factorization.

61542372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18539 (or 18537 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 61542372 is about 7844.8946455641. The cubic root of 61542372 is about 394.8129691922.

Adding to 61542372 its reverse (27324516), we get a palindrome (88866888).

It can be divided in two parts, 615423 and 72, that added together give a triangular number (615495 = T₁₁₀₉).

The spelling of 61542372 in words is "sixty-one million, five hundred forty-two thousand, three hundred seventy-two".