2861431 has 8 divisors (see below), whose sum is σ = 2964528. Its totient is φ = 2760000.

The previous prime is 2861399. The next prime is 2861447. The reversal of 2861431 is 1341682.

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

It is a 6-Lehmer number, since φ(2861431) divides (2861431-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 2861431 - 2⁵ = 2861399 is a prime.

It is a super-2 number, since 2×2861431² = 16375574735522, which contains 22 as substring.

It is a Duffinian number.

2861431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2861396 and 2861405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861461) 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, 3796 + ... + 4486.

It is an arithmetic number, because the mean of its divisors is an integer number (370566).

2^2861431 is an apocalyptic number.

2861431 is a deficient number, since it is larger than the sum of its proper divisors (103097).

2861431 is a wasteful number, since it uses less digits than its factorization.

2861431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833.

The product of its digits is 1152, while the sum is 25.

The square root of 2861431 is about 1691.5764836389. The cubic root of 2861431 is about 141.9692950869.

The spelling of 2861431 in words is "two million, eight hundred sixty-one thousand, four hundred thirty-one".