29072145 has 16 divisors (see below), whose sum is σ = 46609920. Its totient is φ = 15473664.

The previous prime is 29072137. The next prime is 29072149. The reversal of 29072145 is 54127092.

It is not a de Polignac number, because 29072145 - 2³ = 29072137 is a prime.

It is a super-2 number, since 2×29072145² = 1690379229802050, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (29072149) 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, 6976 + ... + 10334.

It is an arithmetic number, because the mean of its divisors is an integer number (2913120).

Almost surely, 2^29072145 is an apocalyptic number.

It is an amenable number.

29072145 is a deficient number, since it is larger than the sum of its proper divisors (17537775).

29072145 is a wasteful number, since it uses less digits than its factorization.

29072145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 29072145 is about 5391.8591413352. The cubic root of 29072145 is about 307.4862443447.

The spelling of 29072145 in words is "twenty-nine million, seventy-two thousand, one hundred forty-five".