1156553 has 2 divisors, whose sum is σ = 1156554. Its totient is φ = 1156552.

The previous prime is 1156541. The next prime is 1156567. The reversal of 1156553 is 3556511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1006009 + 150544 = 1003^2 + 388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156553 - 2⁴ = 1156537 is a prime.

It is a super-2 number, since 2×1156553² = 2675229683618, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1156523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578276 + 578277.

It is an arithmetic number, because the mean of its divisors is an integer number (578277).

2^1156553 is an apocalyptic number.

It is an amenable number.

1156553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156553 is an equidigital number, since it uses as much as digits as its factorization.

1156553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 26.

The square root of 1156553 is about 1075.4315412894. The cubic root of 1156553 is about 104.9675788035.

The spelling of 1156553 in words is "one million, one hundred fifty-six thousand, five hundred fifty-three".