1213625305 has 8 divisors (see below), whose sum is σ = 1487336832. Its totient is φ = 950242608.

The previous prime is 1213625299. The next prime is 1213625341. The reversal of 1213625305 is 5035263121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213625305 - 2¹³ = 1213617113 is a prime.

It is a Duffinian number.

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, 2581947 + ... + 2582416.

It is an arithmetic number, because the mean of its divisors is an integer number (185917104).

Almost surely, 2^1213625305 is an apocalyptic number.

It is an amenable number.

1213625305 is a deficient number, since it is larger than the sum of its proper divisors (273711527).

1213625305 is an equidigital number, since it uses as much as digits as its factorization.

1213625305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164415.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 1213625305 is about 34837.1253837052. The cubic root of 1213625305 is about 1066.6653996838.

Adding to 1213625305 its reverse (5035263121), we get a palindrome (6248888426).

The spelling of 1213625305 in words is "one billion, two hundred thirteen million, six hundred twenty-five thousand, three hundred five".