1235321253 has 16 divisors (see below), whose sum is σ = 1844520960. Its totient is φ = 817060608.

The previous prime is 1235321249. The next prime is 1235321273. The reversal of 1235321253 is 3521235321.

It is a happy number.

1235321253 is a `hidden beast` number, since 1 + 2 + 3 + 532 + 125 + 3 = 666.

It is not a de Polignac number, because 1235321253 - 2² = 1235321249 is a prime.

It is a super-2 number, since 2×1235321253² = 3052037196226980018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235321273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176700 + ... + 183557.

It is an arithmetic number, because the mean of its divisors is an integer number (115282560).

Almost surely, 2^1235321253 is an apocalyptic number.

It is an amenable number.

1235321253 is a deficient number, since it is larger than the sum of its proper divisors (609199707).

1235321253 is a wasteful number, since it uses less digits than its factorization.

1235321253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360393 (or 360387 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 1235321253 is about 35147.1371949409. The cubic root of 1235321253 is about 1072.9841444657.

Adding to 1235321253 its reverse (3521235321), we get a palindrome (4756556574).

The spelling of 1235321253 in words is "one billion, two hundred thirty-five million, three hundred twenty-one thousand, two hundred fifty-three".