1949745 has 32 divisors (see below), whose sum is σ = 3686400. Its totient is φ = 861120.

The previous prime is 1949741. The next prime is 1949771. The reversal of 1949745 is 5479491.

It is not a de Polignac number, because 1949745 - 2² = 1949741 is a prime.

1949745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1949741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2956 + ... + 3554.

It is an arithmetic number, because the mean of its divisors is an integer number (115200).

2^1949745 is an apocalyptic number.

1949745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1949745 is a deficient number, since it is larger than the sum of its proper divisors (1736655).

1949745 is a wasteful number, since it uses less digits than its factorization.

1949745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645.

The product of its digits is 45360, while the sum is 39.

The square root of 1949745 is about 1396.3326967453. The cubic root of 1949745 is about 124.9278516983.

The spelling of 1949745 in words is "one million, nine hundred forty-nine thousand, seven hundred forty-five".