1042551400421 has 8 divisors (see below), whose sum is σ = 1076045972640. Its totient is φ = 1009584301968.

The previous prime is 1042551400391. The next prime is 1042551400483. The reversal of 1042551400421 is 1240041552401.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1042551400421 - 2¹⁴ = 1042551384037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042551400021) 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, 131864426 + ... + 131872331.

It is an arithmetic number, because the mean of its divisors is an integer number (134505746580).

Almost surely, 2^{1042551400421} is an apocalyptic number.

It is an amenable number.

1042551400421 is a deficient number, since it is larger than the sum of its proper divisors (33494572219).

1042551400421 is an equidigital number, since it uses as much as digits as its factorization.

1042551400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263736883.

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 1042551400421 its reverse (1240041552401), we get a palindrome (2282592952822).

The spelling of 1042551400421 in words is "one trillion, forty-two billion, five hundred fifty-one million, four hundred thousand, four hundred twenty-one".