1772105 has 4 divisors (see below), whose sum is σ = 2126532. Its totient is φ = 1417680.

The previous prime is 1772101. The next prime is 1772107. The reversal of 1772105 is 5012771.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5012771 = 2027 ⋅2473.

It can be written as a sum of positive squares in 2 ways, for example, as 1138489 + 633616 = 1067^2 + 796^2 .

It is not a de Polignac number, because 1772105 - 2² = 1772101 is a prime.

It is a super-2 number, since 2×1772105² = 6280712262050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1772101) 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, 177206 + ... + 177215.

It is an arithmetic number, because the mean of its divisors is an integer number (531633).

2^1772105 is an apocalyptic number.

It is an amenable number.

1772105 is a deficient number, since it is larger than the sum of its proper divisors (354427).

1772105 is an equidigital number, since it uses as much as digits as its factorization.

1772105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354426.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 1772105 is about 1331.2043419400. The cubic root of 1772105 is about 121.0123840431.

Adding to 1772105 its reverse (5012771), we get a palindrome (6784876).

The spelling of 1772105 in words is "one million, seven hundred seventy-two thousand, one hundred five".