1201023 has 6 divisors (see below), whose sum is σ = 1734824. Its totient is φ = 800676.

The previous prime is 1201021. The next prime is 1201027. The reversal of 1201023 is 3201021.

It is a happy number.

It is not a de Polignac number, because 1201023 - 2¹ = 1201021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 133447 = 1201023 / (1 + 2 + 0 + 1 + 0 + 2 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200996 and 1201014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66715 + ... + 66732.

2^1201023 is an apocalyptic number.

1201023 is a deficient number, since it is larger than the sum of its proper divisors (533801).

1201023 is a wasteful number, since it uses less digits than its factorization.

1201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133453 (or 133450 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1201023 is about 1095.9119490178. The cubic root of 1201023 is about 106.2960455556.

Adding to 1201023 its reverse (3201021), we get a palindrome (4402044).

It can be divided in two parts, 120 and 1023, that multiplied together give a triangular number (122760 = T₄₉₅).

The spelling of 1201023 in words is "one million, two hundred one thousand, twenty-three".