1213056187 has 16 divisors (see below), whose sum is σ = 1441868032. Its totient is φ = 998917920.

The previous prime is 1213056181. The next prime is 1213056193. The reversal of 1213056187 is 7816503121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1213056181) and next prime (1213056193).

It is not a de Polignac number, because 1213056187 - 2⁷ = 1213056059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213056181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14673 + ... + 51394.

It is an arithmetic number, because the mean of its divisors is an integer number (90116752).

Almost surely, 2^1213056187 is an apocalyptic number.

1213056187 is a deficient number, since it is larger than the sum of its proper divisors (228811845).

1213056187 is an equidigital number, since it uses as much as digits as its factorization.

1213056187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66178.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1213056187 is about 34828.9561571977. The cubic root of 1213056187 is about 1066.4986394291.

The spelling of 1213056187 in words is "one billion, two hundred thirteen million, fifty-six thousand, one hundred eighty-seven".