1975381 has 2 divisors, whose sum is σ = 1975382. Its totient is φ = 1975380.

The previous prime is 1975367. The next prime is 1975387. The reversal of 1975381 is 1835791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 152881 = 1350^2 + 391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1975381 is a prime.

It is a super-2 number, since 2×1975381² = 7804260190322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1975387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987690 + 987691.

It is an arithmetic number, because the mean of its divisors is an integer number (987691).

2^1975381 is an apocalyptic number.

It is an amenable number.

1975381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975381 is an equidigital number, since it uses as much as digits as its factorization.

1975381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 34.

The square root of 1975381 is about 1405.4824794354. The cubic root of 1975381 is about 125.4730025577.

The spelling of 1975381 in words is "one million, nine hundred seventy-five thousand, three hundred eighty-one".