1966245 has 16 divisors (see below), whose sum is σ = 3214080. Its totient is φ = 1025984.

The previous prime is 1966241. The next prime is 1966259. The reversal of 1966245 is 5426691.

It is a cyclic number.

It is not a de Polignac number, because 1966245 - 2² = 1966241 is a prime.

It is a super-2 number, since 2×1966245² = 7732238800050, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 9³ + 6 + 6⁵ + 2⁹ + 4⁶ + 5⁹ .

1966245 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690 + ... + 2099.

It is an arithmetic number, because the mean of its divisors is an integer number (200880).

2^1966245 is an apocalyptic number.

1966245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1966245 is a deficient number, since it is larger than the sum of its proper divisors (1247835).

1966245 is a wasteful number, since it uses less digits than its factorization.

1966245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844.

The product of its digits is 12960, while the sum is 33.

The square root of 1966245 is about 1402.2285833629. The cubic root of 1966245 is about 125.2792689396.

It can be divided in two parts, 1966 and 245, that added together give a triangular number (2211 = T₆₆).

The spelling of 1966245 in words is "one million, nine hundred sixty-six thousand, two hundred forty-five".