1972551 has 32 divisors (see below), whose sum is σ = 3225600. Its totient is φ = 1048320.

The previous prime is 1972541. The next prime is 1972567. The reversal of 1972551 is 1552791.

It is not a de Polignac number, because 1972551 - 2⁷ = 1972423 is a prime.

It is an Ulam number.

1972551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972511) 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 31 ways as a sum of consecutive naturals, for example, 24930 + ... + 25008.

It is an arithmetic number, because the mean of its divisors is an integer number (100800).

2^1972551 is an apocalyptic number.

1972551 is a deficient number, since it is larger than the sum of its proper divisors (1253049).

1972551 is a wasteful number, since it uses less digits than its factorization.

1972551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159.

The product of its digits is 3150, while the sum is 30.

The square root of 1972551 is about 1404.4753468822. The cubic root of 1972551 is about 125.4130549150.

The spelling of 1972551 in words is "one million, nine hundred seventy-two thousand, five hundred fifty-one".