1000245421 has 4 divisors (see below), whose sum is σ = 1143137632. Its totient is φ = 857353212.

The previous prime is 1000245419. The next prime is 1000245427. The reversal of 1000245421 is 1245420001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1245420001 = 7 ⋅177917143.

It is a cyclic number.

It is not a de Polignac number, because 1000245421 - 2¹ = 1000245419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000245427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 71446095 + ... + 71446108.

It is an arithmetic number, because the mean of its divisors is an integer number (285784408).

Almost surely, 2^1000245421 is an apocalyptic number.

It is an amenable number.

1000245421 is a deficient number, since it is larger than the sum of its proper divisors (142892211).

1000245421 is an equidigital number, since it uses as much as digits as its factorization.

1000245421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142892210.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1000245421 is about 31626.6568103554. The cubic root of 1000245421 is about 1000.0818003085.

Adding to 1000245421 its reverse (1245420001), we get a palindrome (2245665422).

The spelling of 1000245421 in words is "one billion, two hundred forty-five thousand, four hundred twenty-one".