1021342651 has 8 divisors (see below), whose sum is σ = 1167676160. Its totient is φ = 875116008.

The previous prime is 1021342649. The next prime is 1021342661. The reversal of 1021342651 is 1562431201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021342651 - 2¹ = 1021342649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021342601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5061 + ... + 45478.

It is an arithmetic number, because the mean of its divisors is an integer number (145959520).

Almost surely, 2^1021342651 is an apocalyptic number.

1021342651 is a deficient number, since it is larger than the sum of its proper divisors (146333509).

1021342651 is an equidigital number, since it uses as much as digits as its factorization.

1021342651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53433.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1021342651 is about 31958.4519493670. The cubic root of 1021342651 is about 1007.0641966182.

Adding to 1021342651 its reverse (1562431201), we get a palindrome (2583773852).

The spelling of 1021342651 in words is "one billion, twenty-one million, three hundred forty-two thousand, six hundred fifty-one".