1172013 has 4 divisors (see below), whose sum is σ = 1562688. Its totient is φ = 781340.

The previous prime is 1172009. The next prime is 1172021. The reversal of 1172013 is 3102711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3102711 = 3 ⋅1034237.

It is a cyclic number.

It is not a de Polignac number, because 1172013 - 2² = 1172009 is a prime.

It is a super-2 number, since 2×1172013² = 2747228944338, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

1172013 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1171983 and 1172001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195333 + ... + 195338.

It is an arithmetic number, because the mean of its divisors is an integer number (390672).

2^1172013 is an apocalyptic number.

It is an amenable number.

1172013 is a deficient number, since it is larger than the sum of its proper divisors (390675).

1172013 is an equidigital number, since it uses as much as digits as its factorization.

1172013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390674.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 1172013 is about 1082.5954923239. The cubic root of 1172013 is about 105.4332214432.

Adding to 1172013 its reverse (3102711), we get a palindrome (4274724).

The spelling of 1172013 in words is "one million, one hundred seventy-two thousand, thirteen".