61865434 has 4 divisors (see below), whose sum is σ = 92798154. Its totient is φ = 30932716.

The previous prime is 61865417. The next prime is 61865437. The reversal of 61865434 is 43456816.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 44849809 + 17015625 = 6697^2 + 4125^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61865393 and 61865402.

It is not an unprimeable number, because it can be changed into a prime (61865437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15466357 + ... + 15466360.

Almost surely, 2^61865434 is an apocalyptic number.

61865434 is a deficient number, since it is larger than the sum of its proper divisors (30932720).

61865434 is a wasteful number, since it uses less digits than its factorization.

61865434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30932719.

The product of its digits is 69120, while the sum is 37.

The square root of 61865434 is about 7865.4582828974. The cubic root of 61865434 is about 395.5026107381.

The spelling of 61865434 in words is "sixty-one million, eight hundred sixty-five thousand, four hundred thirty-four".