1213154400 has 72 divisors (see below), whose sum is σ = 3948825384. Its totient is φ = 323507200.

The previous prime is 1213154381. The next prime is 1213154407. The reversal of 1213154400 is 44513121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213154407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250341 + ... + 255140.

It is an arithmetic number, because the mean of its divisors is an integer number (54844797).

Almost surely, 2^1213154400 is an apocalyptic number.

1213154400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213154400 is an abundant number, since it is smaller than the sum of its proper divisors (2735670984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213154400 is a wasteful number, since it uses less digits than its factorization.

1213154400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505504 (or 505491 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1213154400 is about 34830.3660618145. The cubic root of 1213154400 is about 1066.5274210594.

Adding to 1213154400 its reverse (44513121), we get a palindrome (1257667521).

The spelling of 1213154400 in words is "one billion, two hundred thirteen million, one hundred fifty-four thousand, four hundred".