2987405 has 8 divisors (see below), whose sum is σ = 3605784. Its totient is φ = 2376000.

The previous prime is 2987371. The next prime is 2987407. The reversal of 2987405 is 5047892.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 90601 + 2896804 = 301^2 + 1702^2 .

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

It is not a de Polignac number, because 2987405 - 2¹⁶ = 2921869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2987407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 746 + ... + 2555.

It is an arithmetic number, because the mean of its divisors is an integer number (450723).

2^2987405 is an apocalyptic number.

It is an amenable number.

2987405 is a deficient number, since it is larger than the sum of its proper divisors (618379).

2987405 is a wasteful number, since it uses less digits than its factorization.

2987405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2987405 is about 1728.4111200753. The cubic root of 2987405 is about 144.0228390986.

The spelling of 2987405 in words is "two million, nine hundred eighty-seven thousand, four hundred five".