1201609151 has 8 divisors (see below), whose sum is σ = 1234959264. Its totient is φ = 1168305120.

The previous prime is 1201609141. The next prime is 1201609169. The reversal of 1201609151 is 1519061021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201609151 - 2²² = 1197414847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201609151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201609111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45161 + ... + 66653.

It is an arithmetic number, because the mean of its divisors is an integer number (154369908).

Almost surely, 2^1201609151 is an apocalyptic number.

1201609151 is a deficient number, since it is larger than the sum of its proper divisors (33350113).

1201609151 is a wasteful number, since it uses less digits than its factorization.

1201609151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23041.

The product of its (nonzero) digits is 540, while the sum is 26.

The square root of 1201609151 is about 34664.2344643582. The cubic root of 1201609151 is about 1063.1333509413.

The spelling of 1201609151 in words is "one billion, two hundred one million, six hundred nine thousand, one hundred fifty-one".