1223305139 has 24 divisors (see below), whose sum is σ = 1503541440. Its totient is φ = 989637264.

The previous prime is 1223305133. The next prime is 1223305141. The reversal of 1223305139 is 9315033221.

It is not a de Polignac number, because 1223305139 - 2¹² = 1223301043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223305133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261152 + ... + 265794.

It is an arithmetic number, because the mean of its divisors is an integer number (62647560).

Almost surely, 2^1223305139 is an apocalyptic number.

1223305139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1223305139 is a deficient number, since it is larger than the sum of its proper divisors (280236301).

1223305139 is a wasteful number, since it uses less digits than its factorization.

1223305139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959 (or 4952 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 1223305139 is about 34975.7793194090. The cubic root of 1223305139 is about 1069.4937888515.

The spelling of 1223305139 in words is "one billion, two hundred twenty-three million, three hundred five thousand, one hundred thirty-nine".