1975531 has 4 divisors (see below), whose sum is σ = 1988272. Its totient is φ = 1962792.

The previous prime is 1975529. The next prime is 1975543. The reversal of 1975531 is 1355791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1355791 = 37 ⋅36643.

It is a cyclic number.

It is not a de Polignac number, because 1975531 - 2¹ = 1975529 is a prime.

It is a super-2 number, since 2×1975531² = 7805445463922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1975493 and 1975502.

It is not an unprimeable number, because it can be changed into a prime (1975511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6135 + ... + 6448.

It is an arithmetic number, because the mean of its divisors is an integer number (497068).

2^1975531 is an apocalyptic number.

1975531 is a deficient number, since it is larger than the sum of its proper divisors (12741).

1975531 is a wasteful number, since it uses less digits than its factorization.

1975531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12740.

The product of its digits is 4725, while the sum is 31.

The square root of 1975531 is about 1405.5358408806. The cubic root of 1975531 is about 125.4761783964.

The spelling of 1975531 in words is "one million, nine hundred seventy-five thousand, five hundred thirty-one".