1220742142 has 8 divisors (see below), whose sum is σ = 1831329000. Its totient is φ = 610299144.

The previous prime is 1220742119. The next prime is 1220742151. The reversal of 1220742142 is 2412470221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1220742142² = 2980422754509496328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11392 + ... + 50707.

It is an arithmetic number, because the mean of its divisors is an integer number (228916125).

Almost surely, 2^1220742142 is an apocalyptic number.

1220742142 is a deficient number, since it is larger than the sum of its proper divisors (610586858).

1220742142 is an equidigital number, since it uses as much as digits as its factorization.

1220742142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71930.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 1220742142 is about 34939.1205098239. The cubic root of 1220742142 is about 1068.7463531127.

The spelling of 1220742142 in words is "one billion, two hundred twenty million, seven hundred forty-two thousand, one hundred forty-two".