1335451961 has 4 divisors (see below), whose sum is σ = 1358086800. Its totient is φ = 1312817124.

The previous prime is 1335451919. The next prime is 1335451963. The reversal of 1335451961 is 1691545331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1691545331 = 7 ⋅241649333.

It is a cyclic number.

It is not a de Polignac number, because 1335451961 - 2¹⁰ = 1335450937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1335451963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11317331 + ... + 11317448.

It is an arithmetic number, because the mean of its divisors is an integer number (339521700).

Almost surely, 2^1335451961 is an apocalyptic number.

It is an amenable number.

1335451961 is a deficient number, since it is larger than the sum of its proper divisors (22634839).

1335451961 is an equidigital number, since it uses as much as digits as its factorization.

1335451961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22634838.

The product of its digits is 48600, while the sum is 38.

The square root of 1335451961 is about 36543.8361560469. The cubic root of 1335451961 is about 1101.2250706687.

The spelling of 1335451961 in words is "one billion, three hundred thirty-five million, four hundred fifty-one thousand, nine hundred sixty-one".