452142421 has 4 divisors (see below), whose sum is σ = 478739052. Its totient is φ = 425545792.

The previous prime is 452142407. The next prime is 452142443. The reversal of 452142421 is 124241254.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164839921 + 287302500 = 12839^2 + 16950^2 .

It is a cyclic number.

It is not a de Polignac number, because 452142421 - 2⁹ = 452141909 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 (452142121) 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, 13298290 + ... + 13298323.

It is an arithmetic number, because the mean of its divisors is an integer number (119684763).

Almost surely, 2^452142421 is an apocalyptic number.

It is an amenable number.

452142421 is a deficient number, since it is larger than the sum of its proper divisors (26596631).

452142421 is a wasteful number, since it uses less digits than its factorization.

452142421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26596630.

The product of its digits is 2560, while the sum is 25.

The square root of 452142421 is about 21263.6408218348. The cubic root of 452142421 is about 767.5236241389.

Adding to 452142421 its reverse (124241254), we get a palindrome (576383675).

The spelling of 452142421 in words is "four hundred fifty-two million, one hundred forty-two thousand, four hundred twenty-one".