1290155145 has 16 divisors (see below), whose sum is σ = 2066951040. Its totient is φ = 687181824.

The previous prime is 1290155137. The next prime is 1290155147. The reversal of 1290155145 is 5415510921.

It is not a de Polignac number, because 1290155145 - 2³ = 1290155137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1290155147) 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, 44389 + ... + 67458.

It is an arithmetic number, because the mean of its divisors is an integer number (129184440).

Almost surely, 2^1290155145 is an apocalyptic number.

1290155145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1290155145 is a deficient number, since it is larger than the sum of its proper divisors (776795895).

1290155145 is a wasteful number, since it uses less digits than its factorization.

1290155145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112624.

The product of its (nonzero) digits is 9000, while the sum is 33.

The square root of 1290155145 is about 35918.7297241982. The cubic root of 1290155145 is about 1088.6308722375.

The spelling of 1290155145 in words is "one billion, two hundred ninety million, one hundred fifty-five thousand, one hundred forty-five".