1961355 has 16 divisors (see below), whose sum is σ = 3423744. Its totient is φ = 950880.

The previous prime is 1961347. The next prime is 1961363. The reversal of 1961355 is 5531691.

It is an interprime number because it is at equal distance from previous prime (1961347) and next prime (1961363).

It is not a de Polignac number, because 1961355 - 2³ = 1961347 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5779 + ... + 6108.

It is an arithmetic number, because the mean of its divisors is an integer number (213984).

2^1961355 is an apocalyptic number.

1961355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1961355 is a deficient number, since it is larger than the sum of its proper divisors (1462389).

1961355 is a wasteful number, since it uses less digits than its factorization.

1961355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11906.

The product of its digits is 4050, while the sum is 30.

The square root of 1961355 is about 1400.4838449622. The cubic root of 1961355 is about 125.1753273011.

It can be divided in two parts, 196 and 1355, that added together give a palindrome (1551).

The spelling of 1961355 in words is "one million, nine hundred sixty-one thousand, three hundred fifty-five".