975421 has 2 divisors, whose sum is σ = 975422. Its totient is φ = 975420.

The previous prime is 975389. The next prime is 975427. The reversal of 975421 is 124579.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 632025 + 343396 = 795^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 975421 - 2⁵ = 975389 is a prime.

It is a super-2 number, since 2×975421² = 1902892254482, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 975421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487710 + 487711.

It is an arithmetic number, because the mean of its divisors is an integer number (487711).

2⁹⁷⁵⁴²¹ is an apocalyptic number.

It is an amenable number.

975421 is a deficient number, since it is larger than the sum of its proper divisors (1).

975421 is an equidigital number, since it uses as much as digits as its factorization.

975421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 975421 is about 987.6340415356. The cubic root of 975421 is about 99.1738942860.

The spelling of 975421 in words is "nine hundred seventy-five thousand, four hundred twenty-one".