1213140144 has 40 divisors (see below), whose sum is σ = 3210388272. Its totient is φ = 394516480.

The previous prime is 1213140133. The next prime is 1213140157. The reversal of 1213140144 is 4410413121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213140144.

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, 306249 + ... + 310184.

Almost surely, 2^1213140144 is an apocalyptic number.

It is an amenable number.

1213140144 is an abundant number, since it is smaller than the sum of its proper divisors (1997248128).

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

1213140144 is a wasteful number, since it uses less digits than its factorization.

1213140144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616485 (or 616479 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1213140144 is about 34830.1614122014. The cubic root of 1213140144 is about 1066.5232433899.

Adding to 1213140144 its reverse (4410413121), we get a palindrome (5623553265).

The spelling of 1213140144 in words is "one billion, two hundred thirteen million, one hundred forty thousand, one hundred forty-four".