1902945 has 32 divisors (see below), whose sum is σ = 3502080. Its totient is φ = 872640.

The previous prime is 1902931. The next prime is 1902961. The reversal of 1902945 is 5492091.

It is a happy number.

It is not a de Polignac number, because 1902945 - 2⁶ = 1902881 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2832 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (109440).

2^1902945 is an apocalyptic number.

1902945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1902945 is a deficient number, since it is larger than the sum of its proper divisors (1599135).

1902945 is a wasteful number, since it uses less digits than its factorization.

1902945 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 (nonzero) digits is 3240, while the sum is 30.

The square root of 1902945 is about 1379.4727253556. The cubic root of 1902945 is about 123.9201923158.

The spelling of 1902945 in words is "one million, nine hundred two thousand, nine hundred forty-five".