1213775 has 12 divisors (see below), whose sum is σ = 1538592. Its totient is φ = 949440.

The previous prime is 1213763. The next prime is 1213781. The reversal of 1213775 is 5773121.

It is not a de Polignac number, because 1213775 - 2⁴ = 1213759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 659 + ... + 1691.

It is an arithmetic number, because the mean of its divisors is an integer number (128216).

2^1213775 is an apocalyptic number.

1213775 is a deficient number, since it is larger than the sum of its proper divisors (324817).

1213775 is a wasteful number, since it uses less digits than its factorization.

1213775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090 (or 1085 counting only the distinct ones).

The product of its digits is 1470, while the sum is 26.

The square root of 1213775 is about 1101.7145728364. The cubic root of 1213775 is about 106.6709253942.

Adding to 1213775 its reverse (5773121), we get a palindrome (6986896).

The spelling of 1213775 in words is "one million, two hundred thirteen thousand, seven hundred seventy-five".