1201406289 has 4 divisors (see below), whose sum is σ = 1601875056. Its totient is φ = 800937524.

The previous prime is 1201406281. The next prime is 1201406291. The reversal of 1201406289 is 9826041021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201406289 - 2³ = 1201406281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1201406281) 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, 200234379 + ... + 200234384.

It is an arithmetic number, because the mean of its divisors is an integer number (400468764).

Almost surely, 2^1201406289 is an apocalyptic number.

It is an amenable number.

1201406289 is a deficient number, since it is larger than the sum of its proper divisors (400468767).

1201406289 is an equidigital number, since it uses as much as digits as its factorization.

1201406289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400468766.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1201406289 is about 34661.3082413229. The cubic root of 1201406289 is about 1063.0735196460.

The spelling of 1201406289 in words is "one billion, two hundred one million, four hundred six thousand, two hundred eighty-nine".