1961265371 has 8 divisors (see below), whose sum is σ = 2151984240. Its totient is φ = 1776239712.

The previous prime is 1961265359. The next prime is 1961265409. The reversal of 1961265371 is 1735621691.

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

It is not a de Polignac number, because 1961265371 - 2¹⁴ = 1961248987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961265301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1422581 + ... + 1423958.

It is an arithmetic number, because the mean of its divisors is an integer number (268998030).

Almost surely, 2^1961265371 is an apocalyptic number.

1961265371 is a deficient number, since it is larger than the sum of its proper divisors (190718869).

1961265371 is a wasteful number, since it uses less digits than its factorization.

1961265371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846605.

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

The square root of 1961265371 is about 44286.1758452906. The cubic root of 1961265371 is about 1251.7342053927.

The spelling of 1961265371 in words is "one billion, nine hundred sixty-one million, two hundred sixty-five thousand, three hundred seventy-one".