2602421 has 4 divisors (see below), whose sum is σ = 2609772. Its totient is φ = 2595072.

The previous prime is 2602417. The next prime is 2602429. The reversal of 2602421 is 1242062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1242062 = 2 ⋅621031.

It can be written as a sum of positive squares in 2 ways, for example, as 940900 + 1661521 = 970^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 2602421 - 2² = 2602417 is a prime.

It is a super-2 number, since 2×2602421² = 13545190122482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2602421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2602429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3116 + ... + 3861.

It is an arithmetic number, because the mean of its divisors is an integer number (652443).

2^2602421 is an apocalyptic number.

It is an amenable number.

2602421 is a deficient number, since it is larger than the sum of its proper divisors (7351).

2602421 is an equidigital number, since it uses as much as digits as its factorization.

2602421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7350.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2602421 is about 1613.2020952131. The cubic root of 2602421 is about 137.5495534892.

Adding to 2602421 its reverse (1242062), we get a palindrome (3844483).

The spelling of 2602421 in words is "two million, six hundred two thousand, four hundred twenty-one".