402151 has 4 divisors (see below), whose sum is σ = 405000. Its totient is φ = 399304.

The previous prime is 402139. The next prime is 402197. The reversal of 402151 is 151204.

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 402151 - 2⁷ = 402023 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 (402131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201 + ... + 1498.

It is an arithmetic number, because the mean of its divisors is an integer number (101250).

2⁴⁰²¹⁵¹ is an apocalyptic number.

402151 is a deficient number, since it is larger than the sum of its proper divisors (2849).

402151 is a wasteful number, since it uses less digits than its factorization.

402151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 402151 is about 634.1537668421. The cubic root of 402151 is about 73.8124664668.

Adding to 402151 its reverse (151204), we get a palindrome (553355).

The spelling of 402151 in words is "four hundred two thousand, one hundred fifty-one".