1042078421 has 8 divisors (see below), whose sum is σ = 1064358360. Its totient is φ = 1019895552.

The previous prime is 1042078381. The next prime is 1042078439. The reversal of 1042078421 is 1248702401.

It can be written as a sum of positive squares in 4 ways, for example, as 643636900 + 398441521 = 25370^2 + 19961^2 .

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 1042078421 - 2⁶ = 1042078357 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 (1042078441) 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, 2360 + ... + 45713.

It is an arithmetic number, because the mean of its divisors is an integer number (133044795).

Almost surely, 2^1042078421 is an apocalyptic number.

It is an amenable number.

1042078421 is a deficient number, since it is larger than the sum of its proper divisors (22279939).

1042078421 is an equidigital number, since it uses as much as digits as its factorization.

1042078421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48535.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 1042078421 is about 32281.2394588560. The cubic root of 1042078421 is about 1013.8338815620.

The spelling of 1042078421 in words is "one billion, forty-two million, seventy-eight thousand, four hundred twenty-one".