1213604427 has 32 divisors (see below), whose sum is σ = 1866240000. Its totient is φ = 687168288.

The previous prime is 1213604389. The next prime is 1213604443. The reversal of 1213604427 is 7244063121.

It is not a de Polignac number, because 1213604427 - 2¹² = 1213600331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213604394 and 1213604403.

It is not an unprimeable number, because it can be changed into a prime (1213604467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1875418 + ... + 1876064.

It is an arithmetic number, because the mean of its divisors is an integer number (58320000).

Almost surely, 2^1213604427 is an apocalyptic number.

1213604427 is a deficient number, since it is larger than the sum of its proper divisors (652635573).

1213604427 is a wasteful number, since it uses less digits than its factorization.

1213604427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 1213604427 is about 34836.8257308269. The cubic root of 1213604427 is about 1066.6592830327.

Adding to 1213604427 its reverse (7244063121), we get a palindrome (8457667548).

The spelling of 1213604427 in words is "one billion, two hundred thirteen million, six hundred four thousand, four hundred twenty-seven".