1201553 has 2 divisors, whose sum is σ = 1201554. Its totient is φ = 1201552.

The previous prime is 1201531. The next prime is 1201559. The reversal of 1201553 is 3551021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 868624 + 332929 = 932^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201553 - 2⁶ = 1201489 is a prime.

It is a super-2 number, since 2×1201553² = 2887459223618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1201559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600776 + 600777.

It is an arithmetic number, because the mean of its divisors is an integer number (600777).

2^1201553 is an apocalyptic number.

It is an amenable number.

1201553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201553 is an equidigital number, since it uses as much as digits as its factorization.

1201553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1201553 is about 1096.1537300945. The cubic root of 1201553 is about 106.3116790667.

Adding to 1201553 its reverse (3551021), we get a palindrome (4752574).

The spelling of 1201553 in words is "one million, two hundred one thousand, five hundred fifty-three".