1220403142 has 8 divisors (see below), whose sum is σ = 2092119696. Its totient is φ = 523029912.

The previous prime is 1220403127. The next prime is 1220403169. The reversal of 1220403142 is 2413040221.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43585813 + ... + 43585840.

It is an arithmetic number, because the mean of its divisors is an integer number (261514962).

Almost surely, 2^1220403142 is an apocalyptic number.

1220403142 is a deficient number, since it is larger than the sum of its proper divisors (871716554).

1220403142 is an equidigital number, since it uses as much as digits as its factorization.

1220403142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87171662.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1220403142 is about 34934.2688774218. The cubic root of 1220403142 is about 1068.6474136934.

Adding to 1220403142 its reverse (2413040221), we get a palindrome (3633443363).

The spelling of 1220403142 in words is "one billion, two hundred twenty million, four hundred three thousand, one hundred forty-two".