405402155 has 8 divisors (see below), whose sum is σ = 499630992. Its totient is φ = 315556128.

The previous prime is 405402143. The next prime is 405402187. The reversal of 405402155 is 551204504.

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

It is not a de Polignac number, because 405402155 - 2¹⁰ = 405401131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095497 + ... + 1095866.

It is an arithmetic number, because the mean of its divisors is an integer number (62453874).

Almost surely, 2^405402155 is an apocalyptic number.

405402155 is a deficient number, since it is larger than the sum of its proper divisors (94228837).

405402155 is a wasteful number, since it uses less digits than its factorization.

405402155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191405.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 405402155 is about 20134.6009396760. The cubic root of 405402155 is about 740.1084300572.

Adding to 405402155 its reverse (551204504), we get a palindrome (956606659).

The spelling of 405402155 in words is "four hundred five million, four hundred two thousand, one hundred fifty-five".