1216001452 has 12 divisors (see below), whose sum is σ = 2179905336. Its totient is φ = 593171360.

The previous prime is 1216001447. The next prime is 1216001459. The reversal of 1216001452 is 2541006121.

It is a super-2 number, since 2×1216001452² = 2957319062532216608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1216001459) 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, 3707158 + ... + 3707485.

It is an arithmetic number, because the mean of its divisors is an integer number (181658778).

Almost surely, 2^1216001452 is an apocalyptic number.

It is an amenable number.

1216001452 is a deficient number, since it is larger than the sum of its proper divisors (963903884).

1216001452 is a wasteful number, since it uses less digits than its factorization.

1216001452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7414688 (or 7414686 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1216001452 is about 34871.2123677970. The cubic root of 1216001452 is about 1067.3610843262.

Adding to 1216001452 its reverse (2541006121), we get a palindrome (3757007573).

The spelling of 1216001452 in words is "one billion, two hundred sixteen million, one thousand, four hundred fifty-two".