1421155553451 has 8 divisors (see below), whose sum is σ = 1894911839184. Its totient is φ = 947418151680.

The previous prime is 1421155553417. The next prime is 1421155553459. The reversal of 1421155553451 is 1543555511241.

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

It is not a de Polignac number, because 1421155553451 - 2¹⁵ = 1421155520683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421155553459) 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, 4544446 + ... + 4847091.

It is an arithmetic number, because the mean of its divisors is an integer number (236863979898).

Almost surely, 2^{1421155553451} is an apocalyptic number.

1421155553451 is a deficient number, since it is larger than the sum of its proper divisors (473756285733).

1421155553451 is an equidigital number, since it uses as much as digits as its factorization.

1421155553451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9441981.

The product of its digits is 300000, while the sum is 42.

The spelling of 1421155553451 in words is "one trillion, four hundred twenty-one billion, one hundred fifty-five million, five hundred fifty-three thousand, four hundred fifty-one".