1153052021 has 8 divisors (see below), whose sum is σ = 1259349600. Its totient is φ = 1047000240.

The previous prime is 1153052011. The next prime is 1153052027. The reversal of 1153052021 is 1202503511.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1153052021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1153051984 and 1153052002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153052027) 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, 51566 + ... + 70463.

It is an arithmetic number, because the mean of its divisors is an integer number (157418700).

Almost surely, 2^1153052021 is an apocalyptic number.

1153052021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1153052021 is a deficient number, since it is larger than the sum of its proper divisors (106297579).

1153052021 is a wasteful number, since it uses less digits than its factorization.

1153052021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122899.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1153052021 is about 33956.6196933676. The cubic root of 1153052021 is about 1048.6155664964.

Adding to 1153052021 its reverse (1202503511), we get a palindrome (2355555532).

The spelling of 1153052021 in words is "one billion, one hundred fifty-three million, fifty-two thousand, twenty-one".