1772145 has 16 divisors (see below), whose sum is σ = 3150720. Its totient is φ = 945072.

The previous prime is 1772119. The next prime is 1772167. The reversal of 1772145 is 5412771.

It is not a de Polignac number, because 1772145 - 2⁹ = 1771633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6429 + ... + 6698.

It is an arithmetic number, because the mean of its divisors is an integer number (196920).

2^1772145 is an apocalyptic number.

1772145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1772145 is a deficient number, since it is larger than the sum of its proper divisors (1378575).

1772145 is a wasteful number, since it uses less digits than its factorization.

1772145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13141 (or 13135 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 1772145 is about 1331.2193658447. The cubic root of 1772145 is about 121.0132945345.

It can be divided in two parts, 17721 and 45, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 1772145 in words is "one million, seven hundred seventy-two thousand, one hundred forty-five".