1967945 has 16 divisors (see below), whose sum is σ = 2747520. Its totient is φ = 1325184.

The previous prime is 1967939. The next prime is 1967947. The reversal of 1967945 is 5497691.

It is not a de Polignac number, because 1967945 - 2¹⁴ = 1951561 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1967947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1589 + ... + 2541.

It is an arithmetic number, because the mean of its divisors is an integer number (171720).

2^1967945 is an apocalyptic number.

It is an amenable number.

1967945 is a deficient number, since it is larger than the sum of its proper divisors (779575).

1967945 is an equidigital number, since it uses as much as digits as its factorization.

1967945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024.

The product of its digits is 68040, while the sum is 41.

The square root of 1967945 is about 1402.8346303111. The cubic root of 1967945 is about 125.3153636968.

The spelling of 1967945 in words is "one million, nine hundred sixty-seven thousand, nine hundred forty-five".