1253105401 has 4 divisors (see below), whose sum is σ = 1253426832. Its totient is φ = 1252783972.

The previous prime is 1253105393. The next prime is 1253105417. The reversal of 1253105401 is 1045013521.

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 not a de Polignac number, because 1253105401 - 2³ = 1253105393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253105471) 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, 154795 + ... + 162688.

It is an arithmetic number, because the mean of its divisors is an integer number (313356708).

Almost surely, 2^1253105401 is an apocalyptic number.

It is an amenable number.

1253105401 is a deficient number, since it is larger than the sum of its proper divisors (321431).

1253105401 is an equidigital number, since it uses as much as digits as its factorization.

1253105401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321430.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1253105401 is about 35399.2288192836. The cubic root of 1253105401 is about 1078.1086584722.

Adding to 1253105401 its reverse (1045013521), we get a palindrome (2298118922).

The spelling of 1253105401 in words is "one billion, two hundred fifty-three million, one hundred five thousand, four hundred one".