1021671654 has 16 divisors (see below), whose sum is σ = 2043835200. Its totient is φ = 340475240.

The previous prime is 1021671649. The next prime is 1021671659. The reversal of 1021671654 is 4561761201.

It is an interprime number because it is at equal distance from previous prime (1021671649) and next prime (1021671659).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021671659) 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, 9997 + ... + 46295.

It is an arithmetic number, because the mean of its divisors is an integer number (127739700).

Almost surely, 2^1021671654 is an apocalyptic number.

1021671654 is an abundant number, since it is smaller than the sum of its proper divisors (1022163546).

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

1021671654 is a wasteful number, since it uses less digits than its factorization.

1021671654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40995.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1021671654 is about 31963.5988899873. The cubic root of 1021671654 is about 1007.1723195129.

The spelling of 1021671654 in words is "one billion, twenty-one million, six hundred seventy-one thousand, six hundred fifty-four".