2870661 has 8 divisors (see below), whose sum is σ = 3853504. Its totient is φ = 1900800.

The previous prime is 2870657. The next prime is 2870663. The reversal of 2870661 is 1660782.

It is a happy number.

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

It is not a de Polignac number, because 2870661 - 2² = 2870657 is a prime.

It is a Duffinian number.

2870661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2870663) 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, 2716 + ... + 3621.

It is an arithmetic number, because the mean of its divisors is an integer number (481688).

2^2870661 is an apocalyptic number.

2870661 is the 906-th nonagonal number.

It is an amenable number.

2870661 is a deficient number, since it is larger than the sum of its proper divisors (982843).

2870661 is a wasteful number, since it uses less digits than its factorization.

2870661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6491.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 2870661 is about 1694.3025113598. The cubic root of 2870661 is about 142.1217794174.

The spelling of 2870661 in words is "two million, eight hundred seventy thousand, six hundred sixty-one".