1000400245 has 32 divisors (see below), whose sum is σ = 1321391232. Its totient is φ = 722618112.

The previous prime is 1000400239. The next prime is 1000400251. The reversal of 1000400245 is 5420040001.

It is an interprime number because it is at equal distance from previous prime (1000400239) and next prime (1000400251).

It is a cyclic number.

It is not a de Polignac number, because 1000400245 - 2³ = 1000400237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576399 + ... + 578131.

It is an arithmetic number, because the mean of its divisors is an integer number (41293476).

Almost surely, 2^1000400245 is an apocalyptic number.

It is an amenable number.

1000400245 is a deficient number, since it is larger than the sum of its proper divisors (320990987).

1000400245 is a wasteful number, since it uses less digits than its factorization.

1000400245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1000400245 is about 31629.1043976904. The cubic root of 1000400245 is about 1000.1333972044.

Adding to 1000400245 its reverse (5420040001), we get a palindrome (6420440246).

The spelling of 1000400245 in words is "one billion, four hundred thousand, two hundred forty-five".