1042450217 has 4 divisors (see below), whose sum is σ = 1103770836. Its totient is φ = 981129600.

The previous prime is 1042450193. The next prime is 1042450223. The reversal of 1042450217 is 7120542401.

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 959202841 + 83247376 = 30971^2 + 9124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042450217 - 2²⁴ = 1025673001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042450117) 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, 30660284 + ... + 30660317.

It is an arithmetic number, because the mean of its divisors is an integer number (275942709).

Almost surely, 2^1042450217 is an apocalyptic number.

1042450217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1042450217 is a deficient number, since it is larger than the sum of its proper divisors (61320619).

1042450217 is an equidigital number, since it uses as much as digits as its factorization.

1042450217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61320618.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 1042450217 is about 32286.9976461114. The cubic root of 1042450217 is about 1013.9544401670.

Adding to 1042450217 its reverse (7120542401), we get a palindrome (8162992618).

The spelling of 1042450217 in words is "one billion, forty-two million, four hundred fifty thousand, two hundred seventeen".