1211345 has 16 divisors (see below), whose sum is σ = 1572480. Its totient is φ = 892800.

The previous prime is 1211339. The next prime is 1211381. The reversal of 1211345 is 5431121.

It is not a de Polignac number, because 1211345 - 2⁶ = 1211281 is a prime.

It is a Curzon number.

It is a plaindrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3740 + ... + 4050.

It is an arithmetic number, because the mean of its divisors is an integer number (98280).

2^1211345 is an apocalyptic number.

It is an amenable number.

1211345 is a deficient number, since it is larger than the sum of its proper divisors (361135).

1211345 is a wasteful number, since it uses less digits than its factorization.

1211345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376.

The product of its digits is 120, while the sum is 17.

The square root of 1211345 is about 1100.6111938373. The cubic root of 1211345 is about 106.5996921144.

Adding to 1211345 its reverse (5431121), we get a palindrome (6642466).

The spelling of 1211345 in words is "one million, two hundred eleven thousand, three hundred forty-five".