161430012 has 18 divisors (see below), whose sum is σ = 408059288. Its totient is φ = 53809992.

The previous prime is 161429999. The next prime is 161430053. The reversal of 161430012 is 210034161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2242048 + ... + 2242119.

Almost surely, 2^161430012 is an apocalyptic number.

161430012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161430012 is an abundant number, since it is smaller than the sum of its proper divisors (246629276).

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

161430012 is a wasteful number, since it uses less digits than its factorization.

161430012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484177 (or 4484172 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 161430012 is about 12705.5110877131. The cubic root of 161430012 is about 544.4960827632.

Adding to 161430012 its reverse (210034161), we get a palindrome (371464173).

It can be divided in two parts, 1614 and 30012, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 161430012 in words is "one hundred sixty-one million, four hundred thirty thousand, twelve".