37821121 has 8 divisors (see below), whose sum is σ = 41002304. Its totient is φ = 34678800.

The previous prime is 37821101. The next prime is 37821127. The reversal of 37821121 is 12112873.

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 37821121 - 2⁹ = 37820609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37821127) 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, 7671 + ... + 11596.

It is an arithmetic number, because the mean of its divisors is an integer number (5125288).

Almost surely, 2^37821121 is an apocalyptic number.

It is an amenable number.

37821121 is a deficient number, since it is larger than the sum of its proper divisors (3181183).

37821121 is a wasteful number, since it uses less digits than its factorization.

37821121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19431.

The product of its digits is 672, while the sum is 25.

The square root of 37821121 is about 6149.8878851569. The cubic root of 37821121 is about 335.6691784704.

Adding to 37821121 its reverse (12112873), we get a palindrome (49933994).

The spelling of 37821121 in words is "thirty-seven million, eight hundred twenty-one thousand, one hundred twenty-one".