434721253 has 4 divisors (see below), whose sum is σ = 435974400. Its totient is φ = 433468108.

The previous prime is 434721247. The next prime is 434721323. The reversal of 434721253 is 352127434.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-434721253 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 (434728253) 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, 626053 + ... + 626746.

It is an arithmetic number, because the mean of its divisors is an integer number (108993600).

Almost surely, 2^434721253 is an apocalyptic number.

It is an amenable number.

434721253 is a deficient number, since it is larger than the sum of its proper divisors (1253147).

434721253 is a wasteful number, since it uses less digits than its factorization.

434721253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253146.

The product of its digits is 20160, while the sum is 31.

The square root of 434721253 is about 20849.9700959018. The cubic root of 434721253 is about 757.5366067697.

Adding to 434721253 its reverse (352127434), we get a palindrome (786848687).

It can be divided in two parts, 4347 and 21253, that added together give a square (25600 = 160²).

The spelling of 434721253 in words is "four hundred thirty-four million, seven hundred twenty-one thousand, two hundred fifty-three".