2121948 has 18 divisors (see below), whose sum is σ = 5363904. Its totient is φ = 707304.

The previous prime is 2121943. The next prime is 2121967. The reversal of 2121948 is 8491212.

It is a tau number, because it is divible by the number of its divisors (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29436 + ... + 29507.

2^2121948 is an apocalyptic number.

It is an amenable number.

2121948 is an abundant number, since it is smaller than the sum of its proper divisors (3241956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121948 is a wasteful number, since it uses less digits than its factorization.

2121948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58953 (or 58948 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 2121948 is about 1456.6907702049. The cubic root of 2121948 is about 128.5025006200.

The spelling of 2121948 in words is "two million, one hundred twenty-one thousand, nine hundred forty-eight".