1235401285 has 4 divisors (see below), whose sum is σ = 1482481548. Its totient is φ = 988321024.

The previous prime is 1235401283. The next prime is 1235401291. The reversal of 1235401285 is 5821045321.

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 911617249 + 323784036 = 30193^2 + 17994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235401285 - 2¹ = 1235401283 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 (1235401283) 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, 123540124 + ... + 123540133.

It is an arithmetic number, because the mean of its divisors is an integer number (370620387).

Almost surely, 2^1235401285 is an apocalyptic number.

It is an amenable number.

1235401285 is a deficient number, since it is larger than the sum of its proper divisors (247080263).

1235401285 is an equidigital number, since it uses as much as digits as its factorization.

1235401285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247080262.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1235401285 is about 35148.2757045065. The cubic root of 1235401285 is about 1073.0073155538.

The spelling of 1235401285 in words is "one billion, two hundred thirty-five million, four hundred one thousand, two hundred eighty-five".