1147656121 has 8 divisors (see below), whose sum is σ = 1219318920. Its totient is φ = 1078132608.

The previous prime is 1147656119. The next prime is 1147656131. The reversal of 1147656121 is 1216567411.

It can be written as a sum of positive squares in 4 ways, for example, as 446730496 + 700925625 = 21136^2 + 26475^2 .

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 1147656121 - 2¹ = 1147656119 is a prime.

It is a super-2 number, since 2×1147656121² = 2634229144137533282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1147656101) 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, 533716 + ... + 535861.

It is an arithmetic number, because the mean of its divisors is an integer number (152414865).

Almost surely, 2^1147656121 is an apocalyptic number.

It is an amenable number.

1147656121 is a deficient number, since it is larger than the sum of its proper divisors (71662799).

1147656121 is a wasteful number, since it uses less digits than its factorization.

1147656121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069643.

The product of its digits is 10080, while the sum is 34.

The square root of 1147656121 is about 33877.0736782267. The cubic root of 1147656121 is about 1046.9772842524.

The spelling of 1147656121 in words is "one billion, one hundred forty-seven million, six hundred fifty-six thousand, one hundred twenty-one".