1021254641 has 12 divisors (see below), whose sum is σ = 1123584000. Its totient is φ = 927546840.

The previous prime is 1021254631. The next prime is 1021254673. The reversal of 1021254641 is 1464521201.

It is not a de Polignac number, because 1021254641 - 2¹⁰ = 1021253617 is a prime.

It is a super-2 number, since 2×1021254641² = 2085922083528077762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1021254641.

It is not an unprimeable number, because it can be changed into a prime (1021254631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151460 + ... + 158058.

It is an arithmetic number, because the mean of its divisors is an integer number (93632000).

Almost surely, 2^1021254641 is an apocalyptic number.

1021254641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021254641 is a deficient number, since it is larger than the sum of its proper divisors (102329359).

1021254641 is a wasteful number, since it uses less digits than its factorization.

1021254641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7900 (or 7889 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1021254641 is about 31957.0749756607. The cubic root of 1021254641 is about 1007.0352692497.

Adding to 1021254641 its reverse (1464521201), we get a palindrome (2485775842).

The spelling of 1021254641 in words is "one billion, twenty-one million, two hundred fifty-four thousand, six hundred forty-one".