1230145690 has 16 divisors (see below), whose sum is σ = 2330802720. Its totient is φ = 466160400.

The previous prime is 1230145669. The next prime is 1230145727. The reversal of 1230145690 is 965410321.

It is a super-2 number, since 2×1230145690² = 3026516837251152200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3237036 + ... + 3237415.

It is an arithmetic number, because the mean of its divisors is an integer number (145675170).

Almost surely, 2^1230145690 is an apocalyptic number.

1230145690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1230145690 is a deficient number, since it is larger than the sum of its proper divisors (1100657030).

1230145690 is a wasteful number, since it uses less digits than its factorization.

1230145690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6474477.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1230145690 is about 35073.4328231498. The cubic root of 1230145690 is about 1071.4835710772.

The spelling of 1230145690 in words is "one billion, two hundred thirty million, one hundred forty-five thousand, six hundred ninety".