62121281 has 4 divisors (see below), whose sum is σ = 65775492. Its totient is φ = 58467072.

The previous prime is 62121271. The next prime is 62121287. The reversal of 62121281 is 18212126.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18212126 = 2 ⋅9106063.

It can be written as a sum of positive squares in 2 ways, for example, as 53217025 + 8904256 = 7295^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 62121281 - 2⁶ = 62121217 is a prime.

It is a super-2 number, since 2×62121281² = 7718107106161922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (62121287) 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, 1827080 + ... + 1827113.

It is an arithmetic number, because the mean of its divisors is an integer number (16443873).

Almost surely, 2^62121281 is an apocalyptic number.

It is an amenable number.

62121281 is a deficient number, since it is larger than the sum of its proper divisors (3654211).

62121281 is a wasteful number, since it uses less digits than its factorization.

62121281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654210.

The product of its digits is 384, while the sum is 23.

The square root of 62121281 is about 7881.7054626521. The cubic root of 62121281 is about 396.0470665582.

The spelling of 62121281 in words is "sixty-two million, one hundred twenty-one thousand, two hundred eighty-one".