45211421 has 2 divisors, whose sum is σ = 45211422. Its totient is φ = 45211420.

The previous prime is 45211367. The next prime is 45211429. The reversal of 45211421 is 12411254.

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., 43375396 + 1836025 = 6586^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 45211421 - 2¹⁰ = 45210397 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 45211393 and 45211402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45211429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22605710 + 22605711.

It is an arithmetic number, because the mean of its divisors is an integer number (22605711).

Almost surely, 2^45211421 is an apocalyptic number.

It is an amenable number.

45211421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45211421 is an equidigital number, since it uses as much as digits as its factorization.

45211421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 320, while the sum is 20.

The square root of 45211421 is about 6723.9438575883. The cubic root of 45211421 is about 356.2454988248.

Adding to 45211421 its reverse (12411254), we get a palindrome (57622675).

The spelling of 45211421 in words is "forty-five million, two hundred eleven thousand, four hundred twenty-one".