1972540 has 12 divisors (see below), whose sum is σ = 4142376. Its totient is φ = 789008.

The previous prime is 1972511. The next prime is 1972541. The reversal of 1972540 is 452791.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1972499 and 1972508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49294 + ... + 49333.

It is an arithmetic number, because the mean of its divisors is an integer number (345198).

2^1972540 is an apocalyptic number.

1972540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1972540 is an abundant number, since it is smaller than the sum of its proper divisors (2169836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1972540 is a wasteful number, since it uses less digits than its factorization.

1972540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98636 (or 98634 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1972540 is about 1404.4714308237. The cubic root of 1972540 is about 125.4128217911.

The spelling of 1972540 in words is "one million, nine hundred seventy-two thousand, five hundred forty".