12345490 has 16 divisors (see below), whose sum is σ = 22695552. Its totient is φ = 4832944.

The previous prime is 12345479. The next prime is 12345491. The reversal of 12345490 is 9454321.

It is a super-2 number, since 2×12345490² = 304822246680200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (12345491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12664 + ... + 13603.

It is an arithmetic number, because the mean of its divisors is an integer number (1418472).

Almost surely, 2^12345490 is an apocalyptic number.

12345490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12345490 is a deficient number, since it is larger than the sum of its proper divisors (10350062).

12345490 is a wasteful number, since it uses less digits than its factorization.

12345490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26321.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 12345490 is about 3513.6149476003. The cubic root of 12345490 is about 231.1192452930.

It can be divided in two parts, 1234 and 5490, that added together give a square (6724 = 82²).

The spelling of 12345490 in words is "twelve million, three hundred forty-five thousand, four hundred ninety".