1453231421 has 4 divisors (see below), whose sum is σ = 1454672700. Its totient is φ = 1451790144.

The previous prime is 1453231411. The next prime is 1453231453. The reversal of 1453231421 is 1241323541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1241323541 = 14369 ⋅86389.

It can be written as a sum of positive squares in 2 ways, for example, as 134815321 + 1318416100 = 11611^2 + 36310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1453231421 - 2⁶ = 1453231357 is a prime.

It is a super-2 number, since 2×1453231421² = 4223763125963358482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1453231411) 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, 719126 + ... + 721143.

It is an arithmetic number, because the mean of its divisors is an integer number (363668175).

Almost surely, 2^1453231421 is an apocalyptic number.

It is an amenable number.

1453231421 is a deficient number, since it is larger than the sum of its proper divisors (1441279).

1453231421 is a wasteful number, since it uses less digits than its factorization.

1453231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441278.

The product of its digits is 2880, while the sum is 26.

The square root of 1453231421 is about 38121.2725522116. The cubic root of 1453231421 is about 1132.6913739165.

Adding to 1453231421 its reverse (1241323541), we get a palindrome (2694554962).

The spelling of 1453231421 in words is "one billion, four hundred fifty-three million, two hundred thirty-one thousand, four hundred twenty-one".