1219155434 has 16 divisors (see below), whose sum is σ = 2180850048. Its totient is φ = 499777872.

The previous prime is 1219155401. The next prime is 1219155521. The reversal of 1219155434 is 4345519121.

It is a junction number, because it is equal to n+sod(n) for n = 1219155394 and 1219155403.

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, 1892777 + ... + 1893420.

It is an arithmetic number, because the mean of its divisors is an integer number (136303128).

Almost surely, 2^1219155434 is an apocalyptic number.

1219155434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1219155434 is a deficient number, since it is larger than the sum of its proper divisors (961694614).

1219155434 is a wasteful number, since it uses less digits than its factorization.

1219155434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786229.

The product of its digits is 21600, while the sum is 35.

The square root of 1219155434 is about 34916.4063729359. The cubic root of 1219155434 is about 1068.2831038635.

The spelling of 1219155434 in words is "one billion, two hundred nineteen million, one hundred fifty-five thousand, four hundred thirty-four".