2987645 has 6 divisors (see below), whose sum is σ = 3589818. Its totient is φ = 2387024.

The previous prime is 2987623. The next prime is 2987651. The reversal of 2987645 is 5467892.

It can be written as a sum of positive squares in 3 ways, for example, as 128164 + 2859481 = 358^2 + 1691^2 .

It is not a de Polignac number, because 2987645 - 2¹⁴ = 2971261 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 9² + 8⁷ + 7⁷ + 6⁴ + 4⁸ + 5 .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3479 + ... + 4251.

It is an arithmetic number, because the mean of its divisors is an integer number (598303).

2^2987645 is an apocalyptic number.

It is an amenable number.

2987645 is a deficient number, since it is larger than the sum of its proper divisors (602173).

2987645 is an frugal number, since it uses more digits than its factorization.

2987645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551 (or 778 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 2987645 is about 1728.4805466073. The cubic root of 2987645 is about 144.0266957965.

The spelling of 2987645 in words is "two million, nine hundred eighty-seven thousand, six hundred forty-five".