1235545397 has 4 divisors (see below), whose sum is σ = 1308224556. Its totient is φ = 1162866240.

The previous prime is 1235545391. The next prime is 1235545417. The reversal of 1235545397 is 7935455321.

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 694796881 + 540748516 = 26359^2 + 23254^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235545397 - 2¹⁴ = 1235529013 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 (1235545391) 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, 36339554 + ... + 36339587.

It is an arithmetic number, because the mean of its divisors is an integer number (327056139).

Almost surely, 2^1235545397 is an apocalyptic number.

1235545397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1235545397 is a deficient number, since it is larger than the sum of its proper divisors (72679159).

1235545397 is an equidigital number, since it uses as much as digits as its factorization.

1235545397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72679158.

The product of its digits is 567000, while the sum is 44.

The square root of 1235545397 is about 35150.3257026162. The cubic root of 1235545397 is about 1073.0490367391.

The spelling of 1235545397 in words is "one billion, two hundred thirty-five million, five hundred forty-five thousand, three hundred ninety-seven".