1172649 has 4 divisors (see below), whose sum is σ = 1563536. Its totient is φ = 781764.

The previous prime is 1172579. The next prime is 1172657. The reversal of 1172649 is 9462711.

It is a happy number.

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: 9462711 = 3 ⋅3154237.

It is not a de Polignac number, because 1172649 - 2⁸ = 1172393 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1172659) 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, 195439 + ... + 195444.

It is an arithmetic number, because the mean of its divisors is an integer number (390884).

2^1172649 is an apocalyptic number.

It is an amenable number.

1172649 is a deficient number, since it is larger than the sum of its proper divisors (390887).

1172649 is an equidigital number, since it uses as much as digits as its factorization.

1172649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390886.

The product of its digits is 3024, while the sum is 30.

The square root of 1172649 is about 1082.8891910071. The cubic root of 1172649 is about 105.4522893213.

The spelling of 1172649 in words is "one million, one hundred seventy-two thousand, six hundred forty-nine".