1245540190 has 32 divisors (see below), whose sum is σ = 2378561760. Its totient is φ = 467979264.

The previous prime is 1245540187. The next prime is 1245540199. The reversal of 1245540190 is 910455421.

It is a super-2 number, since 2×1245540190² = 3102740729810472200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245540199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81906 + ... + 95914.

It is an arithmetic number, because the mean of its divisors is an integer number (74330055).

Almost surely, 2^1245540190 is an apocalyptic number.

1245540190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1245540190 is a deficient number, since it is larger than the sum of its proper divisors (1133021570).

1245540190 is a wasteful number, since it uses less digits than its factorization.

1245540190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14556.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1245540190 is about 35292.2114637210. The cubic root of 1245540190 is about 1075.9347024631.

The spelling of 1245540190 in words is "one billion, two hundred forty-five million, five hundred forty thousand, one hundred ninety".