245498138 has 4 divisors (see below), whose sum is σ = 368247210. Its totient is φ = 122749068.

The previous prime is 245498129. The next prime is 245498167. The reversal of 245498138 is 831894542.

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: 831894542 = 2 ⋅415947271.

It can be written as a sum of positive squares in only one way, i.e., 224310529 + 21187609 = 14977^2 + 4603^2 .

It is a super-2 number, since 2×245498138² = 120538671522934088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61374533 + ... + 61374536.

Almost surely, 2^245498138 is an apocalyptic number.

245498138 is a deficient number, since it is larger than the sum of its proper divisors (122749072).

245498138 is a wasteful number, since it uses less digits than its factorization.

245498138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122749071.

The product of its digits is 276480, while the sum is 44.

The square root of 245498138 is about 15668.3801970721. The cubic root of 245498138 is about 626.1562706353.

The spelling of 245498138 in words is "two hundred forty-five million, four hundred ninety-eight thousand, one hundred thirty-eight".