1152401021 has 4 divisors (see below), whose sum is σ = 1163171232. Its totient is φ = 1141630812.

The previous prime is 1152400999. The next prime is 1152401023. The reversal of 1152401021 is 1201042511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1201042511 = 29 ⋅41415259.

It is a cyclic number.

It is not a de Polignac number, because 1152401021 - 2⁶ = 1152400957 is a prime.

It is a super-2 number, since 2×1152401021² = 2656056226403684882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1152401023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5384945 + ... + 5385158.

It is an arithmetic number, because the mean of its divisors is an integer number (290792808).

Almost surely, 2^1152401021 is an apocalyptic number.

It is an amenable number.

1152401021 is a deficient number, since it is larger than the sum of its proper divisors (10770211).

1152401021 is a wasteful number, since it uses less digits than its factorization.

1152401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10770210.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1152401021 is about 33947.0325801829. The cubic root of 1152401021 is about 1048.4181838881.

Adding to 1152401021 its reverse (1201042511), we get a palindrome (2353443532).

The spelling of 1152401021 in words is "one billion, one hundred fifty-two million, four hundred one thousand, twenty-one".