1219287145 has 16 divisors (see below), whose sum is σ = 1498527360. Its totient is φ = 951882624.

The previous prime is 1219287127. The next prime is 1219287161. The reversal of 1219287145 is 5417829121.

It is a cyclic number.

It is not a de Polignac number, because 1219287145 - 2⁹ = 1219286633 is a prime.

It is a super-2 number, since 2×1219287145² = 2973322283924502050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1219287098 and 1219287107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 343741 + ... + 347269.

It is an arithmetic number, because the mean of its divisors is an integer number (93657960).

Almost surely, 2^1219287145 is an apocalyptic number.

It is an amenable number.

1219287145 is a deficient number, since it is larger than the sum of its proper divisors (279240215).

1219287145 is a wasteful number, since it uses less digits than its factorization.

1219287145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184.

The product of its digits is 40320, while the sum is 40.

The square root of 1219287145 is about 34918.2924124305. The cubic root of 1219287145 is about 1068.3215729997.

The spelling of 1219287145 in words is "one billion, two hundred nineteen million, two hundred eighty-seven thousand, one hundred forty-five".