1961131 has 2 divisors, whose sum is σ = 1961132. Its totient is φ = 1961130.

The previous prime is 1961129. The next prime is 1961147. The reversal of 1961131 is 1311691.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1311691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1961131 - 2¹ = 1961129 is a prime.

It is a super-2 number, since 2×1961131² = 7692069598322, which contains 22 as substring.

Together with 1961129, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1961231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980565 + 980566.

It is an arithmetic number, because the mean of its divisors is an integer number (980566).

2^1961131 is an apocalyptic number.

1961131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961131 is an equidigital number, since it uses as much as digits as its factorization.

1961131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 22.

The square root of 1961131 is about 1400.4038703174. The cubic root of 1961131 is about 125.1705618301.

The spelling of 1961131 in words is "one million, nine hundred sixty-one thousand, one hundred thirty-one".