1021401342 has 96 divisors (see below), whose sum is σ = 2503545408. Its totient is φ = 298603008.

The previous prime is 1021401313. The next prime is 1021401343. The reversal of 1021401342 is 2431041201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021401343) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 930538 + ... + 931634.

It is an arithmetic number, because the mean of its divisors is an integer number (26078598).

Almost surely, 2^1021401342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021401342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251772704).

1021401342 is an abundant number, since it is smaller than the sum of its proper divisors (1482144066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021401342 is a wasteful number, since it uses less digits than its factorization.

1021401342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1311 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1021401342 is about 31959.3701752710. The cubic root of 1021401342 is about 1007.0834864137.

Adding to 1021401342 its reverse (2431041201), we get a palindrome (3452442543).

The spelling of 1021401342 in words is "one billion, twenty-one million, four hundred one thousand, three hundred forty-two".