402119561 has 4 divisors (see below), whose sum is σ = 404818500. Its totient is φ = 399420624.

The previous prime is 402119527. The next prime is 402119563. The reversal of 402119561 is 165911204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 199939600 + 202179961 = 14140^2 + 14219^2 .

It is a cyclic number.

It is not a de Polignac number, because 402119561 - 2¹⁰ = 402118537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402119563) 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, 1349246 + ... + 1349543.

It is an arithmetic number, because the mean of its divisors is an integer number (101204625).

Almost surely, 2^402119561 is an apocalyptic number.

It is an amenable number.

402119561 is a deficient number, since it is larger than the sum of its proper divisors (2698939).

402119561 is a wasteful number, since it uses less digits than its factorization.

402119561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698938.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 402119561 is about 20052.9190144477. The cubic root of 402119561 is about 738.1054293505.

The spelling of 402119561 in words is "four hundred two million, one hundred nineteen thousand, five hundred sixty-one".