61530001 has 8 divisors (see below), whose sum is σ = 68054504. Its totient is φ = 55261440.

The previous prime is 61529977. The next prime is 61530011. The reversal of 61530001 is 10003516.

61530001 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 14250625 + 47279376 = 3775^2 + 6876^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61530001 - 2¹¹ = 61527953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61530011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63480 + ... + 64441.

It is an arithmetic number, because the mean of its divisors is an integer number (8506813).

Almost surely, 2^61530001 is an apocalyptic number.

It is an amenable number.

61530001 is a deficient number, since it is larger than the sum of its proper divisors (6524503).

61530001 is a wasteful number, since it uses less digits than its factorization.

61530001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127971.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 61530001 is about 7844.1061313575. The cubic root of 61530001 is about 394.7865128479.

Adding to 61530001 its reverse (10003516), we get a palindrome (71533517).

The spelling of 61530001 in words is "sixty-one million, five hundred thirty thousand, one".