1253850421 has 4 divisors (see below), whose sum is σ = 1266776812. Its totient is φ = 1240924032.

The previous prime is 1253850401. The next prime is 1253850457. The reversal of 1253850421 is 1240583521.

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 725494225 + 528356196 = 26935^2 + 22986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1253850421 - 2²⁷ = 1119632693 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 (1253850401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6463050 + ... + 6463243.

It is an arithmetic number, because the mean of its divisors is an integer number (316694203).

Almost surely, 2^1253850421 is an apocalyptic number.

It is an amenable number.

1253850421 is a deficient number, since it is larger than the sum of its proper divisors (12926391).

1253850421 is an equidigital number, since it uses as much as digits as its factorization.

1253850421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12926390.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1253850421 is about 35409.7503662480. The cubic root of 1253850421 is about 1078.3222753486.

The spelling of 1253850421 in words is "one billion, two hundred fifty-three million, eight hundred fifty thousand, four hundred twenty-one".