402549 has 16 divisors (see below), whose sum is σ = 635520. Its totient is φ = 221760.

The previous prime is 402541. The next prime is 402551. The reversal of 402549 is 945204.

It is not a de Polignac number, because 402549 - 2³ = 402541 is a prime.

It is a Curzon number.

402549 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279 + ... + 939.

It is an arithmetic number, because the mean of its divisors is an integer number (39720).

2⁴⁰²⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

402549 is a deficient number, since it is larger than the sum of its proper divisors (232971).

402549 is a wasteful number, since it uses less digits than its factorization.

402549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 402549 is about 634.4674932571. The cubic root of 402549 is about 73.8368086298.

The spelling of 402549 in words is "four hundred two thousand, five hundred forty-nine".