2139451 has 8 divisors (see below), whose sum is σ = 2240784. Its totient is φ = 2040480.

The previous prime is 2139427. The next prime is 2139461. The reversal of 2139451 is 1549312.

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

It is a cyclic number.

It is not a de Polignac number, because 2139451 - 2⁷ = 2139323 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 3¹¹ + 9³ + 4⁴ + 5⁹ + 1 .

It is a Duffinian number.

2139451 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2139461) 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, 1416 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (280098).

2^2139451 is an apocalyptic number.

2139451 is a deficient number, since it is larger than the sum of its proper divisors (101333).

2139451 is a wasteful number, since it uses less digits than its factorization.

2139451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181.

The product of its digits is 1080, while the sum is 25.

The square root of 2139451 is about 1462.6862274596. The cubic root of 2139451 is about 128.8548534729.

The spelling of 2139451 in words is "two million, one hundred thirty-nine thousand, four hundred fifty-one".