2378421 has 6 divisors (see below), whose sum is σ = 3435510. Its totient is φ = 1585608.

The previous prime is 2378399. The next prime is 2378423. The reversal of 2378421 is 1248732.

2378421 is a `hidden beast` number, since 237 + 8 + 421 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 1179396 = 1095^2 + 1086^2 .

It is not a de Polignac number, because 2378421 - 2⁶ = 2378357 is a prime.

It is a d-powerful number, because it can be written as 2 + 3⁷ + 7⁵ + 8⁷ + 4⁹ + 2⁷ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2378423) 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, 132126 + ... + 132143.

It is an arithmetic number, because the mean of its divisors is an integer number (572585).

2^2378421 is an apocalyptic number.

It is an amenable number.

2378421 is a deficient number, since it is larger than the sum of its proper divisors (1057089).

2378421 is a wasteful number, since it uses less digits than its factorization.

2378421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264275 (or 264272 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2378421 is about 1542.2130203056. The cubic root of 2378421 is about 133.4841120679.

The spelling of 2378421 in words is "two million, three hundred seventy-eight thousand, four hundred twenty-one".