1213154452 has 24 divisors (see below), whose sum is σ = 2132974592. Its totient is φ = 603741600.

The previous prime is 1213154441. The next prime is 1213154489. The reversal of 1213154452 is 2544513121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213154452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223677 + ... + 1224667.

Almost surely, 2^1213154452 is an apocalyptic number.

It is an amenable number.

1213154452 is a deficient number, since it is larger than the sum of its proper divisors (919820140).

1213154452 is a wasteful number, since it uses less digits than its factorization.

1213154452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119 (or 2117 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 1213154452 is about 34830.3668082896. The cubic root of 1213154452 is about 1066.5274362977.

Adding to 1213154452 its reverse (2544513121), we get a palindrome (3757667573).

The spelling of 1213154452 in words is "one billion, two hundred thirteen million, one hundred fifty-four thousand, four hundred fifty-two".