1961438 has 4 divisors (see below), whose sum is σ = 2942160. Its totient is φ = 980718.

The previous prime is 1961431. The next prime is 1961441. The reversal of 1961438 is 8341691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8341691 = 101 ⋅82591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490358 + ... + 490361.

It is an arithmetic number, because the mean of its divisors is an integer number (735540).

2^1961438 is an apocalyptic number.

1961438 is a deficient number, since it is larger than the sum of its proper divisors (980722).

1961438 is an equidigital number, since it uses as much as digits as its factorization.

1961438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980721.

The product of its digits is 5184, while the sum is 32.

The square root of 1961438 is about 1400.5134772647. The cubic root of 1961438 is about 125.1770929861.

The spelling of 1961438 in words is "one million, nine hundred sixty-one thousand, four hundred thirty-eight".