1253958445 has 8 divisors (see below), whose sum is σ = 1505118744. Its totient is φ = 1002921024.

The previous prime is 1253958443. The next prime is 1253958457. The reversal of 1253958445 is 5448593521.

It can be written as a sum of positive squares in 4 ways, for example, as 2709316 + 1251249129 = 1646^2 + 35373^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1253958445 - 2¹ = 1253958443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1253958395 and 1253958404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253958443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6534 + ... + 50503.

It is an arithmetic number, because the mean of its divisors is an integer number (188139843).

Almost surely, 2^1253958445 is an apocalyptic number.

It is an amenable number.

1253958445 is a deficient number, since it is larger than the sum of its proper divisors (251160299).

1253958445 is an equidigital number, since it uses as much as digits as its factorization.

1253958445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61439.

The product of its digits is 864000, while the sum is 46.

The square root of 1253958445 is about 35411.2756759764. The cubic root of 1253958445 is about 1078.3532416528.

The spelling of 1253958445 in words is "one billion, two hundred fifty-three million, nine hundred fifty-eight thousand, four hundred forty-five".