61272001 has 6 divisors (see below), whose sum is σ = 71275650. Its totient is φ = 52518816.

The previous prime is 61271989. The next prime is 61272007. The reversal of 61272001 is 10027216.

It can be written as a sum of positive squares in only one way, i.e., 36917776 + 24354225 = 6076^2 + 4935^2 .

It is not a de Polignac number, because 61272001 - 2⁹ = 61271489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61272001.

It is not an unprimeable number, because it can be changed into a prime (61272007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 625176 + ... + 625273.

It is an arithmetic number, because the mean of its divisors is an integer number (11879275).

Almost surely, 2^61272001 is an apocalyptic number.

It is an amenable number.

61272001 is a deficient number, since it is larger than the sum of its proper divisors (10003649).

61272001 is a wasteful number, since it uses less digits than its factorization.

61272001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250463 (or 1250456 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 61272001 is about 7827.6433873804. The cubic root of 61272001 is about 394.2339497998.

Adding to 61272001 its reverse (10027216), we get a palindrome (71299217).

It can be divided in two parts, 6127 and 2001, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 61272001 in words is "sixty-one million, two hundred seventy-two thousand, one".