1002144257 has 4 divisors (see below), whose sum is σ = 1004185776. Its totient is φ = 1000102740.

The previous prime is 1002144211. The next prime is 1002144281. The reversal of 1002144257 is 7524412001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1002144257 - 2²⁶ = 935035393 is a prime.

It is a super-2 number, since 2×1002144257² = 2008586223676164098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002144457) 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, 1020023 + ... + 1021004.

It is an arithmetic number, because the mean of its divisors is an integer number (251046444).

Almost surely, 2^1002144257 is an apocalyptic number.

It is an amenable number.

1002144257 is a deficient number, since it is larger than the sum of its proper divisors (2041519).

1002144257 is an equidigital number, since it uses as much as digits as its factorization.

1002144257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041518.

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

The square root of 1002144257 is about 31656.6621266362. The cubic root of 1002144257 is about 1000.7142420701.

Adding to 1002144257 its reverse (7524412001), we get a palindrome (8526556258).

The spelling of 1002144257 in words is "one billion, two million, one hundred forty-four thousand, two hundred fifty-seven".