1021434477 has 16 divisors (see below), whose sum is σ = 1648029312. Its totient is φ = 549342720.

The previous prime is 1021434431. The next prime is 1021434481. The reversal of 1021434477 is 7744341201.

It is not a de Polignac number, because 1021434477 - 2²⁶ = 954325613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021434077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1430224 + ... + 1430937.

It is an arithmetic number, because the mean of its divisors is an integer number (103001832).

Almost surely, 2^1021434477 is an apocalyptic number.

1021434477 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1021434477 is a deficient number, since it is larger than the sum of its proper divisors (626594835).

1021434477 is a wasteful number, since it uses less digits than its factorization.

1021434477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861188.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 1021434477 is about 31959.8885636355. Note that the first 3 decimals coincide. The cubic root of 1021434477 is about 1007.0943764688.

Adding to 1021434477 its reverse (7744341201), we get a palindrome (8765775678).

The spelling of 1021434477 in words is "one billion, twenty-one million, four hundred thirty-four thousand, four hundred seventy-seven".