1235421201 has 16 divisors (see below), whose sum is σ = 1896292224. Its totient is φ = 700800384.

The previous prime is 1235421191. The next prime is 1235421217. The reversal of 1235421201 is 1021245321.

It is not a de Polignac number, because 1235421201 - 2⁵ = 1235421169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1235421301) 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, 211830 + ... + 217583.

It is an arithmetic number, because the mean of its divisors is an integer number (118518264).

Almost surely, 2^1235421201 is an apocalyptic number.

It is an amenable number.

1235421201 is a deficient number, since it is larger than the sum of its proper divisors (660871023).

1235421201 is a wasteful number, since it uses less digits than its factorization.

1235421201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429560.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1235421201 is about 35148.5590174050. The cubic root of 1235421201 is about 1073.0130815342.

Adding to 1235421201 its reverse (1021245321), we get a palindrome (2256666522).

The spelling of 1235421201 in words is "one billion, two hundred thirty-five million, four hundred twenty-one thousand, two hundred one".