3972129 has 8 divisors (see below), whose sum is σ = 6052800. Its totient is φ = 2269776.

The previous prime is 3972119. The next prime is 3972139. The reversal of 3972129 is 9212793.

It is an interprime number because it is at equal distance from previous prime (3972119) and next prime (3972139).

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

It is not a de Polignac number, because 3972129 - 2⁴ = 3972113 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3972129.

It is not an unprimeable number, because it can be changed into a prime (3972119) 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, 94554 + ... + 94595.

It is an arithmetic number, because the mean of its divisors is an integer number (756600).

Almost surely, 2^3972129 is an apocalyptic number.

It is an amenable number.

3972129 is a deficient number, since it is larger than the sum of its proper divisors (2080671).

3972129 is a wasteful number, since it uses less digits than its factorization.

3972129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189159.

The product of its digits is 6804, while the sum is 33.

The square root of 3972129 is about 1993.0200701448. The cubic root of 3972129 is about 158.3705584374.

The spelling of 3972129 in words is "three million, nine hundred seventy-two thousand, one hundred twenty-nine".