1021400143 has 4 divisors (see below), whose sum is σ = 1021862248. Its totient is φ = 1020938040.

The previous prime is 1021400141. The next prime is 1021400147. The reversal of 1021400143 is 3410041201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021400143 - 2¹ = 1021400141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021400141) 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, 227721 + ... + 232162.

It is an arithmetic number, because the mean of its divisors is an integer number (255465562).

Almost surely, 2^1021400143 is an apocalyptic number.

1021400143 is a deficient number, since it is larger than the sum of its proper divisors (462105).

1021400143 is an equidigital number, since it uses as much as digits as its factorization.

1021400143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462104.

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

The square root of 1021400143 is about 31959.3514170735. The cubic root of 1021400143 is about 1007.0830923494.

Adding to 1021400143 its reverse (3410041201), we get a palindrome (4431441344).

The spelling of 1021400143 in words is "one billion, twenty-one million, four hundred thousand, one hundred forty-three".