1156002121 has 8 divisors (see below), whose sum is σ = 1211105024. Its totient is φ = 1102012560.

The previous prime is 1156002109. The next prime is 1156002139. The reversal of 1156002121 is 1212006511.

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 1156002121 - 2²³ = 1147613513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1156002101) 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, 276210 + ... + 280363.

It is an arithmetic number, because the mean of its divisors is an integer number (151388128).

Almost surely, 2^1156002121 is an apocalyptic number.

It is an amenable number.

1156002121 is a deficient number, since it is larger than the sum of its proper divisors (55102903).

1156002121 is an equidigital number, since it uses as much as digits as its factorization.

1156002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556671.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1156002121 is about 34000.0311911622. The cubic root of 1156002121 is about 1049.5091041679.

Adding to 1156002121 its reverse (1212006511), we get a palindrome (2368008632).

The spelling of 1156002121 in words is "one billion, one hundred fifty-six million, two thousand, one hundred twenty-one".