11215739 has 2 divisors, whose sum is σ = 11215740. Its totient is φ = 11215738.

The previous prime is 11215727. The next prime is 11215741. The reversal of 11215739 is 93751211.

It is a strong prime.

It is an emirp because it is prime and its reverse (93751211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11215739 - 2⁸ = 11215483 is a prime.

It is a super-2 number, since 2×11215739² = 251585602632242, which contains 22 as substring.

Together with 11215741, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11215759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5607869 + 5607870.

It is an arithmetic number, because the mean of its divisors is an integer number (5607870).

Almost surely, 2^11215739 is an apocalyptic number.

11215739 is a deficient number, since it is larger than the sum of its proper divisors (1).

11215739 is an equidigital number, since it uses as much as digits as its factorization.

11215739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1890, while the sum is 29.

The square root of 11215739 is about 3348.9907434927. The cubic root of 11215739 is about 223.8425432029.

It can be divided in two parts, 112 and 15739, that added together give a palindrome (15851).

The spelling of 11215739 in words is "eleven million, two hundred fifteen thousand, seven hundred thirty-nine".