1251240602 has 4 divisors (see below), whose sum is σ = 1876860906. Its totient is φ = 625620300.

The previous prime is 1251240593. The next prime is 1251240607. The reversal of 1251240602 is 2060421521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2060421521 = 461 ⋅4469461.

It can be written as a sum of positive squares in only one way, i.e., 1022656441 + 228584161 = 31979^2 + 15119^2 .

It is not an unprimeable number, because it can be changed into a prime (1251240607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312810149 + ... + 312810152.

Almost surely, 2^1251240602 is an apocalyptic number.

1251240602 is a deficient number, since it is larger than the sum of its proper divisors (625620304).

1251240602 is an equidigital number, since it uses as much as digits as its factorization.

1251240602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625620303.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1251240602 is about 35372.8794700121. The cubic root of 1251240602 is about 1077.5735999811.

The spelling of 1251240602 in words is "one billion, two hundred fifty-one million, two hundred forty thousand, six hundred two".