1215101 has 4 divisors (see below), whose sum is σ = 1219104. Its totient is φ = 1211100.

The previous prime is 1215083. The next prime is 1215103. The reversal of 1215101 is 1015121.

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 1215101 - 2¹⁰ = 1214077 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 (1215103) 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 3 ways as a sum of consecutive naturals, for example, 1505 + ... + 2166.

It is an arithmetic number, because the mean of its divisors is an integer number (304776).

2^1215101 is an apocalyptic number.

It is an amenable number.

1215101 is a deficient number, since it is larger than the sum of its proper divisors (4003).

1215101 is an equidigital number, since it uses as much as digits as its factorization.

1215101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002.

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

The square root of 1215101 is about 1102.3161978307. The cubic root of 1215101 is about 106.7097558118.

The spelling of 1215101 in words is "one million, two hundred fifteen thousand, one hundred one".