402154015 has 4 divisors (see below), whose sum is σ = 482584824. Its totient is φ = 321723208.

The previous prime is 402153937. The next prime is 402154021. The reversal of 402154015 is 510451204.

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

It is a cyclic number.

It is not a de Polignac number, because 402154015 - 2⁹ = 402153503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40215397 + ... + 40215406.

It is an arithmetic number, because the mean of its divisors is an integer number (120646206).

Almost surely, 2^402154015 is an apocalyptic number.

402154015 is a deficient number, since it is larger than the sum of its proper divisors (80430809).

402154015 is an equidigital number, since it uses as much as digits as its factorization.

402154015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80430808.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 402154015 is about 20053.7780729717. The cubic root of 402154015 is about 738.1265092818.

The spelling of 402154015 in words is "four hundred two million, one hundred fifty-four thousand, fifteen".