1042038421 has 4 divisors (see below), whose sum is σ = 1042112844. Its totient is φ = 1041964000.

The previous prime is 1042038383. The next prime is 1042038461. The reversal of 1042038421 is 1248302401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 716632900 + 325405521 = 26770^2 + 18039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042038421 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 (1042038461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9160 + ... + 46561.

It is an arithmetic number, because the mean of its divisors is an integer number (260528211).

Almost surely, 2^1042038421 is an apocalyptic number.

It is an amenable number.

1042038421 is a deficient number, since it is larger than the sum of its proper divisors (74423).

1042038421 is an equidigital number, since it uses as much as digits as its factorization.

1042038421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74422.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1042038421 is about 32280.6198980131. The cubic root of 1042038421 is about 1013.8209094499.

It can be divided in two parts, 10420 and 38421, that added together give a square (48841 = 221²).

The spelling of 1042038421 in words is "one billion, forty-two million, thirty-eight thousand, four hundred twenty-one".