1045419821 has 4 divisors (see below), whose sum is σ = 1055569632. Its totient is φ = 1035270012.

The previous prime is 1045419799. The next prime is 1045419857. The reversal of 1045419821 is 1289145401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1289145401 = 14821 ⋅86981.

It is a cyclic number.

It is not a de Polignac number, because 1045419821 - 2¹⁸ = 1045157677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045419421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5074751 + ... + 5074956.

It is an arithmetic number, because the mean of its divisors is an integer number (263892408).

Almost surely, 2^1045419821 is an apocalyptic number.

It is an amenable number.

1045419821 is a deficient number, since it is larger than the sum of its proper divisors (10149811).

1045419821 is a wasteful number, since it uses less digits than its factorization.

1045419821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10149810.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1045419821 is about 32332.9525561771. The cubic root of 1045419821 is about 1014.9163369449.

The spelling of 1045419821 in words is "one billion, forty-five million, four hundred nineteen thousand, eight hundred twenty-one".