1201511 has 8 divisors (see below), whose sum is σ = 1240320. Its totient is φ = 1163448.

The previous prime is 1201493. The next prime is 1201513. The reversal of 1201511 is 1151021.

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 1201511 - 2¹⁴ = 1185127 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1201492 and 1201501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5180 + ... + 5406.

It is an arithmetic number, because the mean of its divisors is an integer number (155040).

2^1201511 is an apocalyptic number.

1201511 is a deficient number, since it is larger than the sum of its proper divisors (38809).

1201511 is an equidigital number, since it uses as much as digits as its factorization.

1201511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 1201511 is about 1096.1345720303. The cubic root of 1201511 is about 106.3104403524.

Adding to 1201511 its reverse (1151021), we get a palindrome (2352532).

The spelling of 1201511 in words is "one million, two hundred one thousand, five hundred eleven".