12156045 has 16 divisors (see below), whose sum is σ = 21218112. Its totient is φ = 5893760.

The previous prime is 12156043. The next prime is 12156047. The reversal of 12156045 is 54065121.

It is an interprime number because it is at equal distance from previous prime (12156043) and next prime (12156047).

It is not a de Polignac number, because 12156045 - 2¹ = 12156043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156043) 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, 36672 + ... + 37001.

It is an arithmetic number, because the mean of its divisors is an integer number (1326132).

Almost surely, 2^12156045 is an apocalyptic number.

12156045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12156045 is a deficient number, since it is larger than the sum of its proper divisors (9062067).

12156045 is a wasteful number, since it uses less digits than its factorization.

12156045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73692.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 12156045 is about 3486.5520216971. The cubic root of 12156045 is about 229.9309496562.

It can be divided in two parts, 1215 and 6045, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 12156045 in words is "twelve million, one hundred fifty-six thousand, forty-five".