1021653541 has 8 divisors (see below), whose sum is σ = 1077917120. Its totient is φ = 965639232.

The previous prime is 1021653533. The next prime is 1021653553. The reversal of 1021653541 is 1453561201.

1021653541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1021653541 - 2³ = 1021653533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021653571) 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, 53865 + ... + 70318.

It is an arithmetic number, because the mean of its divisors is an integer number (134739640).

Almost surely, 2^1021653541 is an apocalyptic number.

It is an amenable number.

1021653541 is a deficient number, since it is larger than the sum of its proper divisors (56263579).

1021653541 is a wasteful number, since it uses less digits than its factorization.

1021653541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124635.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1021653541 is about 31963.3155507998. The cubic root of 1021653541 is about 1007.1663674963.

The spelling of 1021653541 in words is "one billion, twenty-one million, six hundred fifty-three thousand, five hundred forty-one".