30040061 has 4 divisors (see below), whose sum is σ = 30056124. Its totient is φ = 30024000.

The previous prime is 30040057. The next prime is 30040063. The reversal of 30040061 is 16004003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16004003 = 313 ⋅51131.

It can be written as a sum of positive squares in 2 ways, for example, as 21808900 + 8231161 = 4670^2 + 2869^2 .

It is a cyclic number.

It is not a de Polignac number, because 30040061 - 2² = 30040057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30040063) 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, 4790 + ... + 9111.

It is an arithmetic number, because the mean of its divisors is an integer number (7514031).

Almost surely, 2^30040061 is an apocalyptic number.

It is an amenable number.

30040061 is a deficient number, since it is larger than the sum of its proper divisors (16063).

30040061 is a wasteful number, since it uses less digits than its factorization.

30040061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16062.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30040061 is about 5480.8814072191. The cubic root of 30040061 is about 310.8614989000.

Adding to 30040061 its reverse (16004003), we get a palindrome (46044064).

The spelling of 30040061 in words is "thirty million, forty thousand, sixty-one".