1002453421 has 4 divisors (see below), whose sum is σ = 1002527200. Its totient is φ = 1002379644.

The previous prime is 1002453409. The next prime is 1002453437. The reversal of 1002453421 is 1243542001.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002453421 is a prime.

It is a super-2 number, since 2×1002453421² = 2009825722549206482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002453392 and 1002453401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002453481) 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, 9951 + ... + 45868.

It is an arithmetic number, because the mean of its divisors is an integer number (250631800).

Almost surely, 2^1002453421 is an apocalyptic number.

It is an amenable number.

1002453421 is a deficient number, since it is larger than the sum of its proper divisors (73779).

1002453421 is an equidigital number, since it uses as much as digits as its factorization.

1002453421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73778.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1002453421 is about 31661.5448296510. The cubic root of 1002453421 is about 1000.8171391018.

Adding to 1002453421 its reverse (1243542001), we get a palindrome (2245995422).

The spelling of 1002453421 in words is "one billion, two million, four hundred fifty-three thousand, four hundred twenty-one".