400162061 has 4 divisors (see below), whose sum is σ = 430943772. Its totient is φ = 369380352.

The previous prime is 400162019. The next prime is 400162069. The reversal of 400162061 is 160261004.

It is a happy number.

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 165122500 + 235039561 = 12850^2 + 15331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400162061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400162069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15390836 + ... + 15390861.

It is an arithmetic number, because the mean of its divisors is an integer number (107735943).

Almost surely, 2^400162061 is an apocalyptic number.

It is an amenable number.

400162061 is a deficient number, since it is larger than the sum of its proper divisors (30781711).

400162061 is a wasteful number, since it uses less digits than its factorization.

400162061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30781710.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 400162061 is about 20004.0511147117. The cubic root of 400162061 is about 736.9057925975.

The spelling of 400162061 in words is "four hundred million, one hundred sixty-two thousand, sixty-one".