402012069 has 8 divisors (see below), whose sum is σ = 538055232. Its totient is φ = 266988480.

The previous prime is 402012059. The next prime is 402012133. The reversal of 402012069 is 960210204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402012069 - 2¹⁹ = 401487781 is a prime.

It is a super-2 number, since 2×402012069² = 323227407243321522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402012029) 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 7 ways as a sum of consecutive naturals, for example, 253972 + ... + 255549.

It is an arithmetic number, because the mean of its divisors is an integer number (67256904).

Almost surely, 2^402012069 is an apocalyptic number.

It is an amenable number.

402012069 is a deficient number, since it is larger than the sum of its proper divisors (136043163).

402012069 is a wasteful number, since it uses less digits than its factorization.

402012069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509787.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 402012069 is about 20050.2386270089. The cubic root of 402012069 is about 738.0396549663.

The spelling of 402012069 in words is "four hundred two million, twelve thousand, sixty-nine".