402161273 has 2 divisors, whose sum is σ = 402161274. Its totient is φ = 402161272.

The previous prime is 402161267. The next prime is 402161293. The reversal of 402161273 is 372161204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264615289 + 137545984 = 16267^2 + 11728^2 .

It is a cyclic number.

It is not a de Polignac number, because 402161273 - 2⁶ = 402161209 is a prime.

It is equal to p_21445370 and since 402161273 and 21445370 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (402161213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201080636 + 201080637.

It is an arithmetic number, because the mean of its divisors is an integer number (201080637).

Almost surely, 2^402161273 is an apocalyptic number.

It is an amenable number.

402161273 is a deficient number, since it is larger than the sum of its proper divisors (1).

402161273 is an equidigital number, since it uses as much as digits as its factorization.

402161273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 402161273 is about 20053.9590355620. The cubic root of 402161273 is about 738.1309497779.

The spelling of 402161273 in words is "four hundred two million, one hundred sixty-one thousand, two hundred seventy-three".