61542867 has 4 divisors (see below), whose sum is σ = 82057160. Its totient is φ = 41028576.

The previous prime is 61542853. The next prime is 61542913. The reversal of 61542867 is 76824516.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61542867 - 2¹¹ = 61540819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61542827) 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, 10257142 + ... + 10257147.

It is an arithmetic number, because the mean of its divisors is an integer number (20514290).

Almost surely, 2^61542867 is an apocalyptic number.

61542867 is a deficient number, since it is larger than the sum of its proper divisors (20514293).

61542867 is a wasteful number, since it uses less digits than its factorization.

61542867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20514292.

The product of its digits is 80640, while the sum is 39.

The square root of 61542867 is about 7844.9261946815. The cubic root of 61542867 is about 394.8140277143.

It can be divided in two parts, 615428 and 67, that added together give a triangular number (615495 = T₁₁₀₉).

The spelling of 61542867 in words is "sixty-one million, five hundred forty-two thousand, eight hundred sixty-seven".