1972090 has 16 divisors (see below), whose sum is σ = 3571200. Its totient is φ = 784080.

The previous prime is 1972079. The next prime is 1972093. The reversal of 1972090 is 902791.

It is not an unprimeable number, because it can be changed into a prime (1972093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1495 + ... + 2485.

It is an arithmetic number, because the mean of its divisors is an integer number (223200).

2^1972090 is an apocalyptic number.

1972090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1972090 is a deficient number, since it is larger than the sum of its proper divisors (1599110).

1972090 is a wasteful number, since it uses less digits than its factorization.

1972090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1972090 is about 1404.3112190679. The cubic root of 1972090 is about 125.4032841625.

The spelling of 1972090 in words is "one million, nine hundred seventy-two thousand, ninety".