1213620356 has 24 divisors (see below), whose sum is σ = 2314772544. Its totient is φ = 553381920.

The previous prime is 1213620337. The next prime is 1213620409. The reversal of 1213620356 is 6530263121.

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, 136280 + ... + 144911.

It is an arithmetic number, because the mean of its divisors is an integer number (96448856).

Almost surely, 2^1213620356 is an apocalyptic number.

It is an amenable number.

1213620356 is a deficient number, since it is larger than the sum of its proper divisors (1101152188).

1213620356 is a wasteful number, since it uses less digits than its factorization.

1213620356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281291 (or 281289 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1213620356 is about 34837.0543530879. The cubic root of 1213620356 is about 1066.6639497761.

Adding to 1213620356 its reverse (6530263121), we get a palindrome (7743883477).

The spelling of 1213620356 in words is "one billion, two hundred thirteen million, six hundred twenty thousand, three hundred fifty-six".