1962181 has 8 divisors (see below), whose sum is σ = 2129400. Its totient is φ = 1797312.

The previous prime is 1962161. The next prime is 1962193. The reversal of 1962181 is 1812691.

1962181 = 990² + 991².

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 285156 + 1677025 = 534^2 + 1295^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1962181 - 2⁹ = 1961669 is a prime.

It is a super-2 number, since 2×1962181² = 7700308553522, which contains 22 as substring.

1962181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1962131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431 + ... + 2443.

It is an arithmetic number, because the mean of its divisors is an integer number (266175).

2^1962181 is an apocalyptic number.

1962181 is the 991-st centered square number.

It is an amenable number.

1962181 is a deficient number, since it is larger than the sum of its proper divisors (167219).

1962181 is a wasteful number, since it uses less digits than its factorization.

1962181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1175.

The product of its digits is 864, while the sum is 28.

The square root of 1962181 is about 1400.7787120027. The cubic root of 1962181 is about 125.1928968400.

The spelling of 1962181 in words is "one million, nine hundred sixty-two thousand, one hundred eighty-one".