1972538 has 8 divisors (see below), whose sum is σ = 2975700. Its totient is φ = 980640.

The previous prime is 1972511. The next prime is 1972541. The reversal of 1972538 is 8352791.

It can be written as a sum of positive squares in 2 ways, for example, as 1399489 + 573049 = 1183^2 + 757^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1972538² = 7781812322888, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1972498 and 1972507.

It is an unprimeable number.

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, 2363 + ... + 3086.

2^1972538 is an apocalyptic number.

1972538 is a deficient number, since it is larger than the sum of its proper divisors (1003162).

1972538 is a wasteful number, since it uses less digits than its factorization.

1972538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5632.

The product of its digits is 15120, while the sum is 35.

The square root of 1972538 is about 1404.4707188119. The cubic root of 1972538 is about 125.4127794049.

The spelling of 1972538 in words is "one million, nine hundred seventy-two thousand, five hundred thirty-eight".