1403256145 has 4 divisors (see below), whose sum is σ = 1683907380. Its totient is φ = 1122604912.

The previous prime is 1403256097. The next prime is 1403256161. The reversal of 1403256145 is 5416523041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 219276864 + 1183979281 = 14808^2 + 34409^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403256145 - 2¹⁹ = 1402731857 is a prime.

It is a super-2 number, since 2×1403256145² = 3938255616960522050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140325610 + ... + 140325619.

It is an arithmetic number, because the mean of its divisors is an integer number (420976845).

Almost surely, 2^1403256145 is an apocalyptic number.

It is an amenable number.

1403256145 is a deficient number, since it is larger than the sum of its proper divisors (280651235).

1403256145 is an equidigital number, since it uses as much as digits as its factorization.

1403256145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280651234.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1403256145 is about 37460.0606646599. The cubic root of 1403256145 is about 1119.5555594695. Note that the first 5 decimals are identical.

Adding to 1403256145 its reverse (5416523041), we get a palindrome (6819779186).

The spelling of 1403256145 in words is "one billion, four hundred three million, two hundred fifty-six thousand, one hundred forty-five".