1961001 has 24 divisors (see below), whose sum is σ = 3429504. Its totient is φ = 1054080.

The previous prime is 1960993. The next prime is 1961021. The reversal of 1961001 is 1001691.

It is not a de Polignac number, because 1961001 - 2³ = 1960993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1961021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156 + ... + 1986.

It is an arithmetic number, because the mean of its divisors is an integer number (142896).

2^1961001 is an apocalyptic number.

It is an amenable number.

1961001 is a deficient number, since it is larger than the sum of its proper divisors (1468503).

1961001 is a wasteful number, since it uses less digits than its factorization.

1961001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1861 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1961001 is about 1400.3574543666. The cubic root of 1961001 is about 125.1677959886.

Adding to 1961001 its reverse (1001691), we get a palindrome (2962692).

The spelling of 1961001 in words is "one million, nine hundred sixty-one thousand, one".