1021342425 has 24 divisors (see below), whose sum is σ = 1689582336. Its totient is φ = 544405440.

The previous prime is 1021342423. The next prime is 1021342457. The reversal of 1021342425 is 5242431201.

It is not a de Polignac number, because 1021342425 - 2¹ = 1021342423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021342395 and 1021342404.

It is not an unprimeable number, because it can be changed into a prime (1021342423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198232 + ... + 203318.

It is an arithmetic number, because the mean of its divisors is an integer number (70399264).

Almost surely, 2^1021342425 is an apocalyptic number.

1021342425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021342425 is a deficient number, since it is larger than the sum of its proper divisors (668239911).

1021342425 is a wasteful number, since it uses less digits than its factorization.

1021342425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7777 (or 7772 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1021342425 is about 31958.4484135260. The cubic root of 1021342425 is about 1007.0641223381.

Adding to 1021342425 its reverse (5242431201), we get a palindrome (6263773626).

The spelling of 1021342425 in words is "one billion, twenty-one million, three hundred forty-two thousand, four hundred twenty-five".