2139501 has 32 divisors (see below), whose sum is σ = 3725568. Its totient is φ = 1059840.

The previous prime is 2139499. The next prime is 2139521. The reversal of 2139501 is 1059312.

It is not a de Polignac number, because 2139501 - 2¹ = 2139499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4411 + ... + 4871.

It is an arithmetic number, because the mean of its divisors is an integer number (116424).

2^2139501 is an apocalyptic number.

2139501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2139501 is a deficient number, since it is larger than the sum of its proper divisors (1586067).

2139501 is a wasteful number, since it uses less digits than its factorization.

2139501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 2139501 is about 1462.7033192004. The cubic root of 2139501 is about 128.8558572651.

The spelling of 2139501 in words is "two million, one hundred thirty-nine thousand, five hundred one".