1023521412 has 24 divisors (see below), whose sum is σ = 2513912800. Its totient is φ = 323217216.

The previous prime is 1023521377. The next prime is 1023521423. The reversal of 1023521412 is 2141253201.

It is a super-4 number, since 4×1023521412⁴ (a number of 37 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244337 + ... + 2244792.

Almost surely, 2^1023521412 is an apocalyptic number.

1023521412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1023521412 is an abundant number, since it is smaller than the sum of its proper divisors (1490391388).

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

1023521412 is a wasteful number, since it uses less digits than its factorization.

1023521412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489155 (or 4489153 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1023521412 is about 31992.5211885528. The cubic root of 1023521412 is about 1007.7797885985.

Adding to 1023521412 its reverse (2141253201), we get a palindrome (3164774613).

The spelling of 1023521412 in words is "one billion, twenty-three million, five hundred twenty-one thousand, four hundred twelve".