1271617061 has 8 divisors (see below), whose sum is σ = 1493927904. Its totient is φ = 1067091120.

The previous prime is 1271617049. The next prime is 1271617079. The reversal of 1271617061 is 1607161721.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1271617061 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 (1271617001) 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, 4446071 + ... + 4446356.

It is an arithmetic number, because the mean of its divisors is an integer number (186740988).

Almost surely, 2^1271617061 is an apocalyptic number.

1271617061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1271617061 is a deficient number, since it is larger than the sum of its proper divisors (222310843).

1271617061 is a wasteful number, since it uses less digits than its factorization.

1271617061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8892451.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 1271617061 is about 35659.7400579421. The cubic root of 1271617061 is about 1083.3915618616.

Adding to 1271617061 its reverse (1607161721), we get a palindrome (2878778782).

The spelling of 1271617061 in words is "one billion, two hundred seventy-one million, six hundred seventeen thousand, sixty-one".