1012165400 has 24 divisors (see below), whose sum is σ = 2353285020. Its totient is φ = 404866080.

The previous prime is 1012165387. The next prime is 1012165403. The reversal of 1012165400 is 45612101.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012165403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2530214 + ... + 2530613.

Almost surely, 2^1012165400 is an apocalyptic number.

1012165400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012165400 is an abundant number, since it is smaller than the sum of its proper divisors (1341119620).

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

1012165400 is a wasteful number, since it uses less digits than its factorization.

1012165400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060843 (or 5060834 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1012165400 is about 31814.5469871881. The cubic root of 1012165400 is about 1004.0387994720.

Adding to 1012165400 its reverse (45612101), we get a palindrome (1057777501).

The spelling of 1012165400 in words is "one billion, twelve million, one hundred sixty-five thousand, four hundred".