4756421 has 2 divisors, whose sum is σ = 4756422. Its totient is φ = 4756420.

The previous prime is 4756417. The next prime is 4756429. The reversal of 4756421 is 1246574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3568321 + 1188100 = 1889^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 4756421 - 2² = 4756417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4756429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2378210 + 2378211.

It is an arithmetic number, because the mean of its divisors is an integer number (2378211).

Almost surely, 2^4756421 is an apocalyptic number.

It is an amenable number.

4756421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4756421 is an equidigital number, since it uses as much as digits as its factorization.

4756421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 4756421 is about 2180.9220527107. The cubic root of 4756421 is about 168.1744809513.

The spelling of 4756421 in words is "four million, seven hundred fifty-six thousand, four hundred twenty-one".