1540423250 has 16 divisors (see below), whose sum is σ = 2883672792. Its totient is φ = 616169200.

The previous prime is 1540423249. The next prime is 1540423327. The reversal of 1540423250 is 523240451.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1019716489 + 520706761 = 31933^2 + 22819^2 .

It is a Curzon number.

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, 3080597 + ... + 3081096.

Almost surely, 2^1540423250 is an apocalyptic number.

1540423250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1540423250 is a deficient number, since it is larger than the sum of its proper divisors (1343249542).

1540423250 is an equidigital number, since it uses as much as digits as its factorization.

1540423250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6161710 (or 6161700 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1540423250 is about 39248.2260745629. The cubic root of 1540423250 is about 1154.9061348105.

The spelling of 1540423250 in words is "one billion, five hundred forty million, four hundred twenty-three thousand, two hundred fifty".