1031400421 has 4 divisors (see below), whose sum is σ = 1092071052. Its totient is φ = 970729792.

The previous prime is 1031400347. The next prime is 1031400481. The reversal of 1031400421 is 1240041301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 320911396 + 710489025 = 17914^2 + 26655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031400421 - 2⁹ = 1031399909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031400395 and 1031400404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031400481) 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, 30335290 + ... + 30335323.

It is an arithmetic number, because the mean of its divisors is an integer number (273017763).

Almost surely, 2^1031400421 is an apocalyptic number.

It is an amenable number.

1031400421 is a deficient number, since it is larger than the sum of its proper divisors (60670631).

1031400421 is an equidigital number, since it uses as much as digits as its factorization.

1031400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60670630.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1031400421 is about 32115.4234130581. The cubic root of 1031400421 is about 1010.3591249787.

Adding to 1031400421 its reverse (1240041301), we get a palindrome (2271441722).

The spelling of 1031400421 in words is "one billion, thirty-one million, four hundred thousand, four hundred twenty-one".