1205401253 has 8 divisors (see below), whose sum is σ = 1380555072. Its totient is φ = 1030985856.

The previous prime is 1205401247. The next prime is 1205401259. The reversal of 1205401253 is 3521045021.

It is an interprime number because it is at equal distance from previous prime (1205401247) and next prime (1205401259).

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 1205401253 - 2⁴ = 1205401237 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 (1205401259) 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, 181100 + ... + 187637.

It is an arithmetic number, because the mean of its divisors is an integer number (172569384).

Almost surely, 2^1205401253 is an apocalyptic number.

It is an amenable number.

1205401253 is a deficient number, since it is larger than the sum of its proper divisors (175153819).

1205401253 is an equidigital number, since it uses as much as digits as its factorization.

1205401253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369211.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1205401253 is about 34718.8889943212. Note that the first 3 decimals coincide. The cubic root of 1205401253 is about 1064.2505407728.

Adding to 1205401253 its reverse (3521045021), we get a palindrome (4726446274).

The spelling of 1205401253 in words is "one billion, two hundred five million, four hundred one thousand, two hundred fifty-three".