1220454142 has 16 divisors (see below), whose sum is σ = 1837946592. Its totient is φ = 607811040.

The previous prime is 1220454133. The next prime is 1220454149. The reversal of 1220454142 is 2414540221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220454149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 752092 + ... + 753712.

It is an arithmetic number, because the mean of its divisors is an integer number (114871662).

Almost surely, 2^1220454142 is an apocalyptic number.

1220454142 is a deficient number, since it is larger than the sum of its proper divisors (617492450).

1220454142 is a wasteful number, since it uses less digits than its factorization.

1220454142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 1220454142 is about 34934.9988120796. The cubic root of 1220454142 is about 1068.6622995555.

Adding to 1220454142 its reverse (2414540221), we get a palindrome (3634994363).

The spelling of 1220454142 in words is "one billion, two hundred twenty million, four hundred fifty-four thousand, one hundred forty-two".