146691945 has 16 divisors (see below), whose sum is σ = 260785920. Its totient is φ = 78235632.

The previous prime is 146691943. The next prime is 146691991. The reversal of 146691945 is 549196641.

It is a happy number.

It is not a de Polignac number, because 146691945 - 2¹ = 146691943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 146691945.

It is not an unprimeable number, because it can be changed into a prime (146691943) 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, 543169 + ... + 543438.

It is an arithmetic number, because the mean of its divisors is an integer number (16299120).

Almost surely, 2^146691945 is an apocalyptic number.

146691945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

146691945 is a deficient number, since it is larger than the sum of its proper divisors (114093975).

146691945 is a wasteful number, since it uses less digits than its factorization.

146691945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086621 (or 1086615 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 146691945 is about 12111.6450162643. The cubic root of 146691945 is about 527.3942886181.

The spelling of 146691945 in words is "one hundred forty-six million, six hundred ninety-one thousand, nine hundred forty-five".