7150421 has 4 divisors (see below), whose sum is σ = 7571052. Its totient is φ = 6729792.

The previous prime is 7150417. The next prime is 7150459. The reversal of 7150421 is 1240517.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2992900 + 4157521 = 1730^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 7150421 - 2² = 7150417 is a prime.

It is a super-2 number, since 2×7150421² = 102257040954482, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7150393 and 7150402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7159421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210290 + ... + 210323.

It is an arithmetic number, because the mean of its divisors is an integer number (1892763).

Almost surely, 2^7150421 is an apocalyptic number.

It is an amenable number.

7150421 is a deficient number, since it is larger than the sum of its proper divisors (420631).

7150421 is a wasteful number, since it uses less digits than its factorization.

7150421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420630.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 7150421 is about 2674.0271128020. The cubic root of 7150421 is about 192.6536334672.

Adding to 7150421 its reverse (1240517), we get a palindrome (8390938).

The spelling of 7150421 in words is "seven million, one hundred fifty thousand, four hundred twenty-one".