1220434136 has 8 divisors (see below), whose sum is σ = 2288314020. Its totient is φ = 610217064.

The previous prime is 1220434129. The next prime is 1220434139. The reversal of 1220434136 is 6314340221.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220434139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76277126 + ... + 76277141.

Almost surely, 2^1220434136 is an apocalyptic number.

It is an amenable number.

1220434136 is a deficient number, since it is larger than the sum of its proper divisors (1067879884).

1220434136 is a wasteful number, since it uses less digits than its factorization.

1220434136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152554273 (or 152554269 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1220434136 is about 34934.7124791374. The cubic root of 1220434136 is about 1068.6564602607.

Adding to 1220434136 its reverse (6314340221), we get a palindrome (7534774357).

The spelling of 1220434136 in words is "one billion, two hundred twenty million, four hundred thirty-four thousand, one hundred thirty-six".