1227723142 has 16 divisors (see below), whose sum is σ = 1870663680. Its totient is φ = 604184328.

The previous prime is 1227723131. The next prime is 1227723151. The reversal of 1227723142 is 2413277221.

It is a super-2 number, since 2×1227723142² = 3014608226804704328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189643 + ... + 196009.

It is an arithmetic number, because the mean of its divisors is an integer number (116916480).

Almost surely, 2^1227723142 is an apocalyptic number.

1227723142 is a deficient number, since it is larger than the sum of its proper divisors (642940538).

1227723142 is a wasteful number, since it uses less digits than its factorization.

1227723142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7875.

The product of its digits is 9408, while the sum is 31.

The square root of 1227723142 is about 35038.8804330275. The cubic root of 1227723142 is about 1070.7797449090.

The spelling of 1227723142 in words is "one billion, two hundred twenty-seven million, seven hundred twenty-three thousand, one hundred forty-two".