1267020890 has 16 divisors (see below), whose sum is σ = 2400671520. Its totient is φ = 480134160.

The previous prime is 1267020883. The next prime is 1267020899. The reversal of 1267020890 is 980207621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1267020890.

It is not an unprimeable number, because it can be changed into a prime (1267020899) 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, 3334076 + ... + 3334455.

It is an arithmetic number, because the mean of its divisors is an integer number (150041970).

Almost surely, 2^1267020890 is an apocalyptic number.

1267020890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1267020890 is a deficient number, since it is larger than the sum of its proper divisors (1133650630).

1267020890 is a wasteful number, since it uses less digits than its factorization.

1267020890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6668557.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1267020890 is about 35595.2369004618. The cubic root of 1267020890 is about 1082.0847050513.

The spelling of 1267020890 in words is "one billion, two hundred sixty-seven million, twenty thousand, eight hundred ninety".