1151821601 has 8 divisors (see below), whose sum is σ = 1317301440. Its totient is φ = 986575248.

The previous prime is 1151821597. The next prime is 1151821661. The reversal of 1151821601 is 1061281511.

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 1151821601 - 2² = 1151821597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1151821661) 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, 47666 + ... + 67643.

It is an arithmetic number, because the mean of its divisors is an integer number (164662680).

Almost surely, 2^1151821601 is an apocalyptic number.

It is an amenable number.

1151821601 is a deficient number, since it is larger than the sum of its proper divisors (165479839).

1151821601 is a wasteful number, since it uses less digits than its factorization.

1151821601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116743.

The product of its (nonzero) digits is 480, while the sum is 26.

The square root of 1151821601 is about 33938.4973297287. The cubic root of 1151821601 is about 1048.2424417368.

The spelling of 1151821601 in words is "one billion, one hundred fifty-one million, eight hundred twenty-one thousand, six hundred one".