1222665142 has 16 divisors (see below), whose sum is σ = 1946177280. Its totient is φ = 574840552.

The previous prime is 1222665091. The next prime is 1222665149. The reversal of 1222665142 is 2415662221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222665149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222538 + ... + 227965.

It is an arithmetic number, because the mean of its divisors is an integer number (121636080).

Almost surely, 2^1222665142 is an apocalyptic number.

1222665142 is a deficient number, since it is larger than the sum of its proper divisors (723512138).

1222665142 is a wasteful number, since it uses less digits than its factorization.

1222665142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450587.

The product of its digits is 11520, while the sum is 31.

The square root of 1222665142 is about 34966.6289767830. The cubic root of 1222665142 is about 1069.3072471635.

The spelling of 1222665142 in words is "one billion, two hundred twenty-two million, six hundred sixty-five thousand, one hundred forty-two".