1962561321 has 24 divisors (see below), whose sum is σ = 3244280000. Its totient is φ = 1119907296.

The previous prime is 1962561313. The next prime is 1962561329. The reversal of 1962561321 is 1231652691.

1962561321 is a `hidden beast` number, since 1 + 9 + 62 + 561 + 32 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1962561313) and next prime (1962561329).

It is not a de Polignac number, because 1962561321 - 2³ = 1962561313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1962561329) 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, 24930 + ... + 67428.

Almost surely, 2^1962561321 is an apocalyptic number.

It is an amenable number.

1962561321 is a deficient number, since it is larger than the sum of its proper divisors (1281718679).

1962561321 is a wasteful number, since it uses less digits than its factorization.

1962561321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43245 (or 43242 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1962561321 is about 44300.8049701131. The cubic root of 1962561321 is about 1252.0098484886.

The spelling of 1962561321 in words is "one billion, nine hundred sixty-two million, five hundred sixty-one thousand, three hundred twenty-one".