1972156 has 12 divisors (see below), whose sum is σ = 3495520. Its totient is φ = 973596.

The previous prime is 1972147. The next prime is 1972169. The reversal of 1972156 is 6512791.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24925 + ... + 25003.

2^1972156 is an apocalyptic number.

It is an amenable number.

1972156 is a deficient number, since it is larger than the sum of its proper divisors (1523364).

1972156 is an frugal number, since it uses more digits than its factorization.

1972156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 81 counting only the distinct ones).

The product of its digits is 3780, while the sum is 31.

The square root of 1972156 is about 1404.3347179359. The cubic root of 1972156 is about 125.4046831055.

The spelling of 1972156 in words is "one million, nine hundred seventy-two thousand, one hundred fifty-six".