1421155553442 has 16 divisors (see below), whose sum is σ = 2842825432512. Its totient is φ = 473632796880.

The previous prime is 1421155553417. The next prime is 1421155553459. The reversal of 1421155553442 is 2443555511241.

It is a junction number, because it is equal to n+sod(n) for n = 1421155553394 and 1421155553403.

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 7 ways as a sum of consecutive naturals, for example, 21394309 + ... + 21460632.

It is an arithmetic number, because the mean of its divisors is an integer number (177676589532).

Almost surely, 2^{1421155553442} is an apocalyptic number.

1421155553442 is an abundant number, since it is smaller than the sum of its proper divisors (1421669879070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421155553442 is a wasteful number, since it uses less digits than its factorization.

1421155553442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42860473.

The product of its digits is 480000, while the sum is 42.

The spelling of 1421155553442 in words is "one trillion, four hundred twenty-one billion, one hundred fifty-five million, five hundred fifty-three thousand, four hundred forty-two".