1220453 has 8 divisors (see below), whose sum is σ = 1323000. Its totient is φ = 1119168.

The previous prime is 1220437. The next prime is 1220489. The reversal of 1220453 is 3540221.

It can be written as a sum of positive squares in 4 ways, for example, as 3844 + 1216609 = 62^2 + 1103^2 .

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 1220453 - 2⁴ = 1220437 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 (1220423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3323 + ... + 3671.

It is an arithmetic number, because the mean of its divisors is an integer number (165375).

2^1220453 is an apocalyptic number.

1220453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1220453 is a deficient number, since it is larger than the sum of its proper divisors (102547).

1220453 is a wasteful number, since it uses less digits than its factorization.

1220453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1220453 is about 1104.7411461514. The cubic root of 1220453 is about 106.8661966234.

Adding to 1220453 its reverse (3540221), we get a palindrome (4760674).

The spelling of 1220453 in words is "one million, two hundred twenty thousand, four hundred fifty-three".