1213542430 has 32 divisors (see below), whose sum is σ = 2257440768. Its totient is φ = 469216800.

The previous prime is 1213542413. The next prime is 1213542443. The reversal of 1213542430 is 342453121.

It is a junction number, because it is equal to n+sod(n) for n = 1213542395 and 1213542404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361339 + ... + 364681.

It is an arithmetic number, because the mean of its divisors is an integer number (70545024).

Almost surely, 2^1213542430 is an apocalyptic number.

1213542430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213542430 is a deficient number, since it is larger than the sum of its proper divisors (1043898338).

1213542430 is a wasteful number, since it uses less digits than its factorization.

1213542430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1213542430 is about 34835.9358995851. The cubic root of 1213542430 is about 1066.6411192883.

Adding to 1213542430 its reverse (342453121), we get a palindrome (1555995551).

The spelling of 1213542430 in words is "one billion, two hundred thirteen million, five hundred forty-two thousand, four hundred thirty".