1213788045 has 8 divisors (see below), whose sum is σ = 1942060896. Its totient is φ = 647353616.

The previous prime is 1213787999. The next prime is 1213788089. The reversal of 1213788045 is 5408873121.

1213788045 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1213788045 - 2¹⁷ = 1213656973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213787994 and 1213788012.

It is a congruent 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, 40459587 + ... + 40459616.

It is an arithmetic number, because the mean of its divisors is an integer number (242757612).

Almost surely, 2^1213788045 is an apocalyptic number.

1213788045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213788045 is a deficient number, since it is larger than the sum of its proper divisors (728272851).

1213788045 is an equidigital number, since it uses as much as digits as its factorization.

1213788045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80919211.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 1213788045 is about 34839.4610319965. The cubic root of 1213788045 is about 1066.7130754005.

The spelling of 1213788045 in words is "one billion, two hundred thirteen million, seven hundred eighty-eight thousand, forty-five".