61001261 has 8 divisors (see below), whose sum is σ = 61564800. Its totient is φ = 60440688.

The previous prime is 61001257. The next prime is 61001279. The reversal of 61001261 is 16210016.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61001261 - 2² = 61001257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61001861) 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, 62600 + ... + 63566.

It is an arithmetic number, because the mean of its divisors is an integer number (7695600).

Almost surely, 2^61001261 is an apocalyptic number.

It is an amenable number.

61001261 is a deficient number, since it is larger than the sum of its proper divisors (563539).

61001261 is a wasteful number, since it uses less digits than its factorization.

61001261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 61001261 is about 7810.3304027423. The cubic root of 61001261 is about 393.6524308177.

Adding to 61001261 its reverse (16210016), we get a palindrome (77211277).

The spelling of 61001261 in words is "sixty-one million, one thousand, two hundred sixty-one".