1005254402 has 4 divisors (see below), whose sum is σ = 1507881606. Its totient is φ = 502627200.

The previous prime is 1005254363. The next prime is 1005254447. The reversal of 1005254402 is 2044525001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2044525001 = 19 ⋅107606579.

It can be written as a sum of positive squares in only one way, i.e., 948085681 + 57168721 = 30791^2 + 7561^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251313599 + ... + 251313602.

Almost surely, 2^1005254402 is an apocalyptic number.

1005254402 is a deficient number, since it is larger than the sum of its proper divisors (502627204).

1005254402 is an equidigital number, since it uses as much as digits as its factorization.

1005254402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502627203.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 1005254402 is about 31705.7471446424. The cubic root of 1005254402 is about 1001.7484086190.

Adding to 1005254402 its reverse (2044525001), we get a palindrome (3049779403).

The spelling of 1005254402 in words is "one billion, five million, two hundred fifty-four thousand, four hundred two".