1401225217 has 12 divisors (see below), whose sum is σ = 1646141076. Its totient is φ = 1189154400.

The previous prime is 1401225209. The next prime is 1401225227. The reversal of 1401225217 is 7125221041.

It can be written as a sum of positive squares in 2 ways, for example, as 1290533776 + 110691441 = 35924^2 + 10521^2 .

It is not a de Polignac number, because 1401225217 - 2³ = 1401225209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401225191 and 1401225200.

It is not an unprimeable number, because it can be changed into a prime (1401225227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136618 + ... + 146515.

It is an arithmetic number, because the mean of its divisors is an integer number (137178423).

It is a Proth number, since it is equal to 21381 ⋅ 2¹⁶ + 1 and 21381 < 2¹⁶.

Almost surely, 2^1401225217 is an apocalyptic number.

It is an amenable number.

1401225217 is a deficient number, since it is larger than the sum of its proper divisors (244915859).

1401225217 is a wasteful number, since it uses less digits than its factorization.

1401225217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283248 (or 283241 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1401225217 is about 37432.9429380058. The cubic root of 1401225217 is about 1119.0151890014.

Adding to 1401225217 its reverse (7125221041), we get a palindrome (8526446258).

The spelling of 1401225217 in words is "one billion, four hundred one million, two hundred twenty-five thousand, two hundred seventeen".